Am I pregnant?

I have recently over the past few months parted from my boyfriend (the father of our daughter). He keeps coming back and saying we should try again and always insists of having sex when he comes round. Gullible as I am I have accepted all of these opportunities just as I am so used to him, a woman has needs and can be myself. I'm currently not on any contraception and when its 'in the moment' with someone you truly love your not going to ruin that moment to say your not on anything. Anyway when we were together and I was on the pill he used the 'pull out method' which worked for us fine 100% as I was protected just as much as his 'true method of pulling out' he called it. My period was on the 5th June (this month) and lasted until 8/9th June. I had sex with him on the 8th and also 15th. I woke up yesterday and today as well feeling sick, stomach cramps, back ache and a metallic taste in my mouth. I know for a fact it's too early to say that I am pregnant or not? My period is due Saturday 25th (6 days time). What are the chances of pregnancy? What do I do?