... then it's probably not a horse. That's what my doctor said when she diagnosed me with POTS based on my symptoms, medical history and a tilt test that was borderline to positive (they hooked me up and tilted me without giving my heart rate a chance to settle to it's baseline, so it was artificially inflated when we started, thus affecting what would've been a straight positive). So she sent me to BIDMC for a confirmation, and I'm still waiting to hear back on the results, and I'm kind of nervous. I had been sick for days, but I had a random good day then, and my tilt numbers weren't nearly what they were before; I hit 122 in the first minute and then bounced around from 87 to 114 with a starting rate of 88. It seemed weird to me that the numbers were all over the place, up and down, changing every minute, but whatever. They ran some other tests, and I don't know what those showed, but I'm terrified the doctor is going to say nothing is wrong. I know they have a copy of the first tilt, though, which had me maintaining in the 120s and shooting higher after nitro. The BIDMC tilt didn't involved drugs. The tech said there's always the option for more testing, but I don't know what that would entail. Of course, that night, I had a 30-second or so episode of ventricular tachycardia, and the next day, after a hot shower, I had a 10-minute episode of v-tach and SVT. I was off my meds for the testing, and when I'm not on them, I get those episodes after showers. I had taken them the night after the test, but I guess it wasn't enough to help in the morning. The combination of standing and heat makes for a bad situation even on normal days, so off meds, it gets a little hairy. Anyway, is there a chance that a good day, and therefore better test results, will mean the specialist is going to say I'm fine? My new doctor told me not to worry, that obviously something is wrong, and we'll keep looking for answers if that happens. I just thought I was finally making progress with regard to answers when I got the diagnosis. I've been sick since I was little and have had more tests than I can possibly count. I've been diagnosed with idiopathic ventricular tachycardia and inappropriate sinus tachycardia, and I have documented episodes of SVT. I've got IBS, GERD and untested but "likely" colonic inertia. I have visual disturbances and vertigo. I've been in physical therapy for myofascial issues, and it turns out I've got hypermobile joints, too. I've been tested for Lyme, rheumatoid arthritis and mono more times than I can count because of my symptoms; I did actually have mono once, though most of those tests came before I actually had it. There are no known causes for any of the above: my heart is structurally fine, my GI system looks fine, eye specialists haven't found an answer for the visual things, and no one knows what the deal is with the vertigo. I'm so freaking tired all the time, and I honestly thought I was losing my mind because of the brain fog. My vision has blacked out at the gym if I'm doing upright cardio, such as using an elliptical, but I can ride the bikes there with fewer problems. If I'm standing and cooking, my heart rate easily gets into the 120s, 130s. It often hangs around 110-130 when I'm standing; my resting heart rate is probably close to 80-85, which the tech at BIDMC said was high, which can complicate a POTS diagnosis, I was told. Stupid things send my heart up, and I used to think it was because I was weak or out of shape, but all my cardiologists -- and there have been many -- said I'm in great shape, not to worry, that this stuff is normal ... until my electrophysiologist put me on another heart monitor earlier this year. I had sinus tach every day, getting into the 150s, 160s, and he asked what I was doing then. When I told him nothing -- looking at the charted times for when this happens, it's usually when I was up and around getting ready for work or when I just got to work and walked up a flight of stairs -- he said that maybe I just need to chill out a bit. Stress is really not the problem here. I'm sorry that was so long, but I'm so confused. Any words of encouragement or advice would be appreciated. My doctor has me set to start on IV fluid therapy, but I have a call in to her to ask whether we should wait for answers from BIDMC, since who knows what they'll say after that testing.