I was overweight with Harrison. I had no issues with BP or diabetes etc, my bloods were always fine and I never had a BP problem. Major problems for me were SPD (over separation of the pubic bone) and bad aches in my pelvis.
I didn't put on much weight at all. I only gained in the 3rd trimester and it was around 4kgs in total. I put it all on again whilst trying to BF.
I personally won't put myself through another pregnancy where I am overweight. I found I was uncomfortable and in a lot of pain. I also missed having a cute tummy (which I had for my other pregnancies)
It can be done. I have a friend who has had a few pregnancies where she has been overweight and had no issues at all, and no pain!
I wish you all the best for a speedy BFP and a happy & healthy pregnancy