When do you give up ?

I’ve been ttc almost 10 years now, I’m 31, doctors can’t figure out why it hasn’t happened neither of us seem to have any problems but every month …. Almost 120 months of trying, being a few days late thinking it must finally be my time to waking up the next morning getting my period… and on top of that I get the heaviest most painful periods I’ve just got to a point where nothing is working it’s just constant disappointment and pain I’m thinking about going on the pill that way I can’t be disappointed every month when my period arrives and my period pain won’t be as bad.