Sex sex SEX!

Ok so I am ovulating. Today is my highest fertility day. Last night my boyfriend and I had sex around 2, and he cummed right outside of my vagina. This morning at 8 we had sex, and he quickly pulled out and cummed on his stomach. Then again at 11 we had sex and he cummed on my ass. I am not on birth control and we don't use condoms. (We are all natural people and don't use any type of birth control). Should I have a plan B pill? Should I be concerned?