I Am Having Some Problems I Had Unsafe Sex I

I am having some problems I had unsafe sex I used the whip out method 2 days later my period came and it wasn't supposed to be here for another 8 days and I usually have cramping nothing happened I get slight cramps and started out real light for 4days unusual for me. I feel sleepy slot and nauseated but no vomiting . I also dislike some foods and crave alot of foods