Could I be pregnant I had unprotected sex about 4 weeks ago and 4 days ago I had unprtected sex again but thought I was coming on the morning I last had sex I bled a tiny bit and never came on I've being having a few tummy cramps and feeling slightly sick but still have nt come on my last period was on the 16th of August and lasted 4days

Have you taken a pregnancy test?

Yes, you are having sex, so you can be pregnant. Missing a period is the first sign