I think I figured out why I haven't gotten pregnant yet! STRESS!!! I'm always stressed out and idk…

I think I figured out why I haven't gotten pregnant yet! STRESS!!! I'm always stressed out and idk why?! It probably has to do with my fiancé's sister because she always has something going on and I always worry about my nephew in these situations....but now since they want to be immature and not let us help them out I'm not going to stress anymore..