Just not working

I’ve been trying for 6 months now and it’s taking its toll on me. What can I do to boost my chances because I’m sick of seeing negative tests. I live in the uk so may have different brands etc and can not get a doctors appointment for anything anymore let alone for this. It’s hard when every pregnancy I’ve had has been conceived on the first try so I’m starting to worry that it’s not going to work for me again. Everyone around me are having babies and it’s starting to get me down. What are your best tips?