Plan B symptoms weeks later?

me and my man had unprotected sex on Jan15th and he didn't pull out in time and half way ejaculated in me. Jan16th we took the Plan B pill. Fast Forward to Jan25th and my breast are so sore, not just on the sides but the entire breasts are killing me. is this normal? I never have breast soreness, i have no pms. and i wasn't ovulating when the incident occured. I'm just confused. the producers said most side effects subside after 24hrs to a coupld days. Should probably mention I had my last period Dec18, then a very odd short light period Jan7, when my cycles are usually 30 days apart. Ang suggestions, advice or experiences would be super helpful. thank you