PossiblyPregnant again?? 3 months post partum!?

First let me say I an 100% breastfeeding (not even pumping yet,and little one only sucks on me or his hands.. No pacifiers)

3 months post partum. No period since birth yet.

I've been sexually active with boyfriend 5 times,2 pulling out and 3 not. From thanksgiving was the first time and the most recent was this past Tuesday.. And 3 times in between.

I've read that if you're strictly breastfeeding baby under 6 months and haven't received post partum period yet,it's like birth control.... So pregnancy is not impossible but not easily likely.

I've been experiencing a few early symptoms the past few days though. Tired,emotional like crazy,crying spells,a bit crampy,lots of white-yellow discharge,joins a bit sore on and off,moody,and hungry a lot!

Anyone experience something similar? Pregnancy so soon after having a baby and while strictly breastfeeding? (Under 6 months)

Thanks!