Can I get pregnant again if I had unprotected sex after 3 weeks of my csection and my man pulls out he has pulled out dozen of times and I have not gotten pregnant before

Any time you have unprotected sex you can get pregnant. The "pull out method" is not a reliable form of birth control. Also because areful as you are not to have intercourse until you have had your 6 week check up and are cleared.

Just to add... it really would not be wise or in your best interest health wise to become pregnant again so soon after giving birth... especially after a c-section. It is important to allow your body to heal, even more so after having had major surgery.

Yes you can get pregnant the withdrawal isn't some sort of birth control you could still catch pregnany even if you haven't before.also you should be thinking of your health at this stage, its not recommened that you have intercourse until at least 6 weeks after delivery.