I take Lowestrin 24FE and i saw that the pack i began taking on the 5th of this month was expired sense september of this yr. I didnt think anything about it at the time, but now i am having a period in the middle of the pack. This sruck me as funny seeing that sense i have began useing this pill , i havent had a period at all, even when i took the 4 days of placiboes i would have period symptoms, but no spotting or bleeding . Should i stop taking it and go to the dr for a new pack?