I Recently Today Just Found Out That I Am Not

I recently today just found out that I am not pregnant, although I had a few symptoms of pregnancy but the hospital said everything came back negative. Now I know my body & my period is always the same; same cramps throughtout the day & my flow goes throughout the day too. Anyways the hospital physician said " i just have an irregular period" But how ? I have cramps that keep coming & going & my flow only happens when I pee. I have NEVER experienced anything such a nausea, light headedness, bloating or my period acting up. Is this actually an irregular period or is this possibly something else ? My period is on time as of today but i still feel bloated (been since the past 3 days) cramps aren't as bad but come & go, & my flow only leaks out when i pee. I'm just scared something is completely wrong. Please help.