pregnant again?

I'm 7 weeks pp And around 4 weeks my S/O and I started having sex again. I'm not on any type of birth control we just use the pull out method. The past week I have been so emotional crying for anything, feeling nauseous, light headed, and having head aches... kinda feels all to familiar. I'm doubting it so much because I never got pregnant with pull out with my boyfriend before I acutally got pregnant (which was planned) as being another pregnancy but what do yal think?