Pregnant??? Please answer!!?

So my boyfriend and I had sex on my ovulation date and one day after, and both times he accidentally began to ejaculated before pulling out. There wasn't much that got into my vagina and most of it was really at the opening not so much inside. I understand the ineffectiveness of using the pullout method no need to criticize. I have been dating this man for a quite a while and we aren't trying to have a child were just not being as careful as one might normally be. But anyway. At the beginning of this week I felt a slight bit different and a few days ago I began feeling very fatigued and crappy. My breasts are very tender and I'm a little bit achey. My period is supposed to come in a weeks time and I normally don't feel pms symptoms this early. Normally about 4 days before my period. Before i began feeling like this I was getting awful migraines. My ovulation date was a little over a week ago so I'm not entirely sure I can even feel symptoms like this this early. When I I get hungry I also feel slightly nauseous as well. I was hoping someone with experience could let me know what my possibilities are and the earliest I can take a test! The more responses the better!