Weight loss journey while TTC

I went off of the pill about 9 months ago before ttc to let my system regulate itself since I’d been on BC for more than 10 years. Since coming off of the pill, I’ve gained 25 pounds. I do have hypothyroid and am on meds for it. I also believe I have pcos or hormone imbalance. I had weight loss surgery back in 2013 and lost 130 pounds at my lowest weight.

We’ve been ttc since January and had a chemical pregnancy in May. It scares me that I’m gaining weight before even getting pregnant. Recently, I’ve started upping my activity with running, hiking and light weight training while tracking my food. Nothing too dangerous or strenuous, but hopefully enough to be healthier.

I guess my question has two parts. Has anyone else gained weight after coming off birth control, and is anyone else out there also trying to lose weight while trying to conceive?