I Am 3 Days Delayed And Afraid That I Might

I am 3 days delayed and afraid that I might be pregnant. I take pills last month but after I finish the first set I missed 3 days and take another set. I decided to stop because my friend told me that 3 days skip is not that safe. I am stressed right now because of my change schedule and body clock. please advise me on what to do doc. anyway I have 7months old baby.