help...

i was suppose to start my period on feb 6 but i didnt start until feb 20th. when i had ny period i was throwing up sick and i never throw up when having my period. that was the first time. my periods arent ever really heavy or bad. my period lasted for 4 days. well ive been having terrible stomach pains. like today i feel so bloated and my stomach hurts. not like im about to start my period. its not like period cramps. idk how to explain it but its uncomfortable. i put jeans on and i had to change cuz my stomach was hurting so bad. what do u think is wrong?