Why the hell am I still ......?

Okay so i stopped my period bout idk last month on a idk im just gunna go with a thursday? Or at least i THOUGHT i stopped...but then less than a week later I started again..this has happened b4. i mean my last time having wuz April 10th!!! Im SO not pregnant. this is getting SOOO annoying and its complete buul sh*t. idk wut the hell is going on but im tired of always thinking im over my period for the month becuz theres no need for a tampon anymore but then like 3 days later i ****in find blood,...in my underwear. idk wut to do bout it either..ugh HELP???