I need opinions pls.

Ok so I have been sexually active since I was 15. I am 23, will be 24 this year. I was only on birth control for 1 year out of this time period from 17 -18 it took me 10 months after getting off the deppo shot to have a period again. I have been with 3 dif men my ex husband and I were together 5 yrs my ex bf 2 yrs and my current bf 3 yrs. My current bf has been the only one to get me pregnant we had 2 miscarriages both at 7 weeks. I know the problem wasn't my ex's tho cuz they both now have kids with other women :( but I went from thinking id never be able to get pregnant and now i know I can get pregnant but I almost don't want to anymore cuz I dont think I could handle another miscarriage. And the doctors say there is nothing wrong with me, as far as they know but they won't really even start to be concerned until I have a 3rd miscarriage. My 1st mc was November of 2013 & my 2nd was January of 2015. I just wish I knew what is wrong with me and if I will ever be a mom.