I been taking birth control pills last month I switched to new ones I didn't get my period last month which I should have started 2nd and ended tbe 5th this month I had intercourse yezterday the 5th and I forgot that the pill I took was a sugar pill what should ii do?

Talk to a doctor . If you missed your period before and wasn't pregnant then don't worry too much but I would still talk to a professional and see what is going on .