I feel like we are never gonna experience it

We've been trying to conceive for about 2 years now. I've tried going to the OBGYN, taking meds, changing my diet, checked to see if we are both okay (which we are) and nothing.... I have irregular periods which seems to make things more difficult apparently. I'm 2 weeks late again, nauseous throughout the day, and just feel like blah...

Ik I'm not pregnant, every time I get my hopes up its a negative and continuously buying tests and just frustrating at this point. Is anyone else experiencing this? Btw sorry for the rant...