idk what this means

so like i was fingered about a month ago and i obviously know you can’t get pregnant from that but idk if he had like precum on his fingers, but a week after i got my period and it was about 4-5 days long it wasn’t light. but now about 2 weeks later my boobs are tender on the sides, u have random cramps, and i’ve been nauseous recently and i usually never am on my period. i’m supposed to start my period in a week what does this mean ?