Pregnant?????๐Ÿ˜ฌ๐Ÿ˜ฉ๐Ÿ˜”

I'm on the mini pill and I take it the same time every day, I've been on it for 4 months now and haven't missed one apart from back in the first month. My boyfriend came inside of me about 2-3 weeks ago for the first time at the weekend I had such a bad lower back, tummy cramps and felt sick sometimes and I also had spotting a few days ago but it's gone now!! What shall I do??