Feeling very down and discouraged...

So my SO and I have been ttc for over 3 years now. I have had 2 miscarriages over that period of time.. I haven't been pregnant for about a year and a half maybe 2 years and I feel like we can't have kids.. I feel like my body is messed up in some way, shape, or form.. He always tells me that we can have kids and that it's just not our time yet, but I feel like something could be wrong.. It's really been getting to me alot lately.. Sorry. I just needed to vent.. Any thoughts would be greatly appreciated. Thankyou lovelys.