Gain weight to conceive?

Amanda • Married 04.25.15❤ Cora Lynn born 02.23.17 💕 MC 11.12.18 and MMC 4.2.19 trying for our 🌈

So i used to be an avid gym goer and weighed about 13 lbs more than i do now. I worked out all through my last pregnancy. I dropped weight FAST while breastfeeding and my lowest was 109. I don’t work out at all like I used to. I am back up to 119 after weaning, which we did to get my cycle back and have another baby. We since have miscarried one baby. I have been fighting to keep the weight off but i am wondering now if that’s is part of the problem, do i need to gain some back to get pregnant again? Any thoughts would be great?