late period

hi i am 21 me and my husband just had a little girl 5 months ago. i am not breast feeding and have had regular periods since i had her. i am currently 5 days late for my period. i had bad migrains about a week ago. i am having slight lower abdomen cramping for the last few days, been feeling hot at night even when the room is 65 degrees TMI: i have been having watery cm for the last week i kept thinking it was my period but it wasnt, and my cervix is high (like one finger lenght yesterday and almost not reachable today) hard, and closed. I have taken 2 early detection tests and they are both negative. Any feedback on if i may be pregnant again or any idea of any thing else that may be going on. Thank you