Could I be pregnant??

I've had sex 3 times after my period. All three times they were unprotected but he pulled out every time. It was August 1st, August 4 and August 8 which on the app says I have a 27% chance being pregnant on August 8 cause it was on a " fertile day " lately my boobs have been hurting like if I touch them they feel so sore and when I take my bra off it just hurts and I've had like cramping but barely I just feel like it's to soon to be feeling that if pregnant but being pregnant wouldn't be a problem but I was just wondering what do you think