I agree strongly with JaneEyre9 — your decision shouldn’t be made on POTS alone, but based on an assessment of your whole situation.
I was diagnosed with POTS in 2015 and had a baby in 2018. My POTS is mild compared to some (i.e., have never fainted, I was able to keep working (I also have a very flexible job)). I was also afraid that pregnancy would make me worse, and that I would stay worse. Pregnancy did make me feel terrible — some of that was POTS, some of that was pregnancy, some of that was being pregnant in a city during the summer. And a couple of months after giving birth, I did flare. In fact, I posted on this forum several months ago, because I was not feeling well, and didn’t feel like I was being the best mother to my baby. That time sucked.
As my baby got a little older and there was a little more time to spend on myself (6 months is way different from 3 months), I started to do more things to manage my condition. I found a new cardiologist and started a different beta blocker, and I started the CHOP exercise protocol. Several months after making those changes, I am actually feeling better than I did before I got pregnant, on most days. My next steps are to keep increasing my exercise intensity, and to address my diet, hoping for further improvement. I don’t know where you are in your journey, but if you haven’t yet tried everything, remember that you might yet feel better. (I hadn’t previously been able to keep up exercise, which is turning out to be really important, and I’m starting to understand that I basically need to organize my whole life around it.)
I agree with the posters who emphasized the importance of a support system. ALL new parents need/deserve a lot of help. You will want a partner who is totally in it with you, and doctors you trust, as many friends/family as you can get to come around. Or if you don’t have one of those things, you’ll want money enough for take-out for months (!).
Hope this helps. Happy to share more/answer any questions.