Seven months and still no luck any suggestions?

We do bbt opks we did the syringe method this last month preesed bd as much as possible (our only issue is we can't just *relax* as many people suggest my husband can only have sex about once a month if we can't do the syringe method (we can do almost everyday with it) because of a medication he takes were so stressed about conceiving and we have tried the just relax method it didn't work lol I'm pretty sure I've had two chemical pregnancies now too so I am really concerned what can we do to concieve?