My dumbass freak out of the evening

Telling myself that i am not pregnant agian. I am 3 weeks pp and i have had sex with a condom it was on correctly. But i think there may have been a leak or a hole because i caught my kitter playing with the pack after the fact. I dont know if i take a pregnancy test it it would be correct or not because i dont know when the hcg from having my son wares off. The only reason i am flipping out is because i feel pregnant agian and i have had morning sickness. It might just me being a little bit of a spaz. Omg idk what to do.i cant be pregnant agian this soon after having a baby right?