having trouble TTC #2!!!

I've been having trouble TTC#2 and I'm going nuts, it's been two years and I feel like I'm to blame for this why can't I get pregnant? Am I thinking too much? Am I scared? Is there something wrong with my husband? All these things are what go through my mind all the time.. I haven't tried pre seed or anything like that so I don't know if I should go see a doctor and talk about this or just wing it.. HELP!!!!😪😳😩