I'm done I'm giving up 😞😢

I got my period once again smh. I want to cry I really don't understand Why I'm not getting pregnant. It's making me so mad. I get my hopes up all the time for no reason just to have af show her ugly Face. Starting to think I'm not meant to be a mother. Anyone could think of anything to Why I haven't gotten pregnant? I have an irregular cycle so I don't know When I ovulate. I'm really about to give up