What's the chance ?

Gave birth Jan 9th and me and my boyfriend recently started having sex again..He doesn't use condoms (uses the pull out method) ...We could have sex and his penis would still be hard after he so he'd cum multiple times. But after he'd come the first time he's just stick it back in my vagina. 
One time he told me he can feel when he's about to nut ..but 2days ago he pulled out and clear stuff was dripping out his penis and he said he couldn't feel it .
So it's been on my mind thinking what was that ? and last night I had clearish pinkish discharge..it can't be what I think it is ...Can it ?