Ttc. spotting 2 days after period. had sex three times every other day of being off period. seventh day, sore breasts. possibility of being pregnant?

Low Probability: Ovulation generally follows menses onset by about 14-15 days. Sexual activity timing was a bit early to match ovulation, though the third time got close, it seems. Breast change would not occur yet even if you conceived. Takes weeks for pregnancy related hormones to alter breast sensations.

Yes: If you are sexually active you could be pregnant. Get a home pregnancy test done.