Light period on year two of birth control.

Julia

Hi! I have tried looking everywhere for an answer but all i get is either that i’m pregnant or a miscarriage or maybe it’s an irregular period (which is weird because i’m on birth control). I am on my second year of birth control, and this month for whatever reason, it was late one day and now it’s very light. My past periods have been very heavy and an overnight pad is usually full but this month there is only a spot the length of my pinky finger for five days now. I have taken a pregnancy test the day before i was SUPPOSED to get my period and it says not pregnant although it’s a little hard to believe considering what i’ve just told you guys. I just need help figuring what’s wrong with me, i will be taking another test, tomorrow though because i want to do it with my s/o by my side. Thank you if you took the time to read!