Help? i might be prego and need to know if i might be and what i should do thanks ?

hi i had sex about almost 4 weeks ago with my bf but i also slept withmy ex bf 4 month but every time i had my monthly they were a lil late or short of having them but on the 3rd i had my monthly but it was 2 days late and only lasted four days and it should of been a week to two weeks long but it wasnt and ive been really sick to my stomach always wanting to throw up and my since of my smell everything makes me sick ive had a head ack sometimes by boobs a tender but dont hurt ive been peeing alot more then usual and have been extremely moody we didnt use protection a couple times about four months ago i me and my ex didnt use protection and i dont use birth control and me and my bf now didnt either because hes allergic to latex and now i think i might be prego since i have almost all the syptoms i might have spelt that wrong if i did sorry. i took to prog test before i had my monthly but they both said i wasnt. so now idk what to do and me and my bf arent to gether we broke up 2 days ago and i dont know what to do plz help