could i be pregnant?

so i had a very long period but it wasn’t heavy the whole time. i had a normal week of bleeding like a period and then the rest was just brown and lingering and then it all finally stopped and i just have regular clear discharge and i haven’t started my next period. i haven’t taken a test yet just bc my period lasted so long that i think that might have something to do with my period being so late right now but i have had heartburn like crazy for like 2 weeks straight now and a watery mouth when i feel the heartburn and that was a major symptom for me when i was pregnant before but it didn’t start until around week 6 of pregnancy