TTC...advice?

So me and my partner have been together two years. All along unprotected.

I wouldn’t say regular sex, also have had irregular periods a lot of stress and weight loss..

I really want to have my own baby now I’m just scared because it has not yet happened! I was 17 when I first got with him so kinda glad it didn’t and we haven’t tried at all.. but now we want to!

Any tips?