Is there any reason to hope for pregnancy?

My husband and I have been trying to conceive a child for 3 1/2 years now. We tried Clomid about 2 year ago. We just decided not to go the whole fertility testing and try to lay off trying to get pregnant. So now we don't count days or take my temp. For the first few months on our new relaxed approach to getting pregnant, I would get antsy when I would be late. After a while I just lost all hope. Now I am 5 days late, an for some reason I feel hope rekindle inside me. I fought back the urge to run out and buy a PG test. I do not want to set myself up for disappointment again. But I cant help but wonder...what are the odds that I could become pregnant with no help after all these years? Or am I just destined to have a test tube baby? Not that that would bother me, though the natural way is so much easier.