HELP!! am i pregnant?

last month before my period, i was spotting, which doesn’t happen. and i ignored it to wait and see if i would miss my period. along with that i had hot flashes and nausea. but then i got my period, at least i think, it was weird. it started off very very light, then went medium, and then just came to a complete stop. which is not how my periods are. they are normally very heavy with clots and slowly get lighter till they are gone. it’s been two weeks since then and i puked my guts up yesterday morning, i’ve been sensitive to smells, and i have been spotting very lightly. is it just a coincidence or is something up?