How likely am I pregnant? *slightly explicit*

When my boyfriend and I have sex, he pulls out, but after he ejaculates, he puts it back in and thrusts a few more times and then he's done. According to my period tracker on my phone, we did it the day after I ovulated and a few more times after. But I'm not sure if those are always correct. I'm not on any birth control nor did we use a condom. How high are my chances at being pregnant?

You definitely have a chance... you are playing with fire here. Start using a condom or you are going to become pregnant. Trust me on this one. And get your boyfriend to use an antibacterial penis health creme too. This will ensure that his penis is extra clean for condom-less sex acts like oral etc. Keep in mind that he can transfer odor and infection-causing bacteria to you during these acts. You want none of this either. Don't mean to be a downer, but you have to be careful. Hope this helps.