FREAKING OUT HELP PLEASE

Okay so i need help guys!! My period is late by 6 days but its never a normal period. I have a pinching pain in my abdomen on my right side. Minor cramps here and there, i have diarrhea, my skin is so dry i have patches, my limbs hurt all the time! I just got rid of a UTI and i took a pregnancy test and it definitely said negative. Not to mention when i was pregnant i had diabetes. Is it possible that i have diabetes now? Or maybe thyroid disease? pregnancy test wrong? Please help