HEELLLP!

I took myself off birth control a month ago because it made me feel very nauseous all the time and very uncomfortable. My boyfriend and I had unprotected sex once within the time i took myself off the birth control. I was suppose to get my period this week but no sign of it. Thoughout the week i would get light cramps as if my period was coming on but it never did. What should I do 🤦🏽‍♀️?!