☹️☹️☹️baby deprived

Does anyone else want a child so much their heart breaks a little when they get their period? Mine does. 
I'm trying so hard with my partner to get pregnant. We've been having sex continuously at the weekends when he's home from the army without any birth control whatsoever. We've been trying now for around 7 months, both being 20 were young and I kind of expecting a more swift pregnancy to be honest. Any ideas guys? When do I say enough is enough? Should the two of us have fertility tests done? Help!