advice please :)

Hi all does any have irregular cycles since going off bc? I have been off it for almost 3 yrs that's how long me & hubby been ttc baby #1 to cut a long story short I they are still irregular get them for 3 months then not get one for months. I haven't had once since June have done tests all say negative. Is it possible to be pregnant and not "feel" pregnant apart from maybe noticing some weight gain? Just after any stories of anyone this has happened to? What were your signs? Did you get negative tests???!!! Thanks all sorry for long post!!!