Help!

Hi! So a few days ago i was worry because i have unprotected sex (sorry for my english) and i was feeling so bad and when i say bad is very bad with nauseas, lot of things smelling bad to me, etc... So then my period come on sept 5 just my regular date and i feel aleve but the first day was so weird a brown or very dark blood i guess and i dont know what to think! And during those days with period which last 5 days i was still feeling bad and i still feel bad even when im brushing my teeths i was going to throw up (vomit) i've been with lots of craving specially pasta i cant get enough of it but also some days i just cant eat because i dont feel hungry and i have morning sickness. So my friend told me take a blood test cuz u might be pregnant but i dont know. Please help me and tell me if any of you have ever feel like that