Ttc after miscarriages

Val
So hubs n I have been ttc #2 for over 2 years now. We've been doing everything possible to help ourselves(tracking, timing, ect) I've had 3 miscarriages that I know of.(most recent one 6 months ago).  Doctors say everything is normal n hubs n I both had fertility test done but it's still not happening. Any one else having this hard of time?  Trying to stay positive but month after month bfn after bfn, is getting very discouraging...