what’s wrong with me 😩

ok so I was wondering if it’s me or my partner but even though I went to the obgyn/ doctor...they said that I am able to have kids but I feel like I can’t 😔 not that I’m actually trying but I was thinking that I would atleast want one SOONER OR LATER. read somewhere that having pcos or endometriosis can stop you from having babies but I also don’t know if I have those (yes I will test-I’m going to the hospital tomorrow anyway because I’m having excruciating sharp pains in my back). but my partner’s mother also thought I might have a thyroid problem because my partner told her I have heavy cramps and that I could have surgery to get something removed and I might be very fertile. been having sex ten months ONLY to my partner and no baby and most couples, after 6 months, conceive then. what could it be/ what could I have 😩 is it my diet that I need to change ? please no judging I’m just asking for advice and maybe somebody is going through what I’m going or went through what I went through and made it and got pregnant.