Had sex but bf didn't cum, had spotty period 2 months in row, had neg. pregnancy test and now my stomach hurts all day, can i be pregnant?

Unlikely: Very unlikely that you are pregnant on the basis of your history. Though you describe having sex but bf didn't cum, this can be unreliable as pre-ejaculation fluid can contain sperm. Negative pregnancy test fairly reliable if performed and interpreted correctly and if it was not performed too early. Consider repeating test and/or see your healthcare provider if your symptoms persist.