tips and tricks please!!

Hey ladies, it's now TTC month 16 for me and I'm getting down about it. I've seen my GP who ran tests and said I didn't ovulate when he tested so to continue with opks at home. Have continued that and most months I have had strong positive opks! Other half also had tests which showed that his sperm morphology is a bit off so does need to go back this month for more tests.
Has anyone else tried for this long and changed something in their ttc routine and got a bfp? I'm desperate to try anything!