Body big issue

Hi, you need to give more information than that if you want help.

Last month i had a regular period that lasted from 10/3 - 10/8 two days after i had unprotected sex. On the first of this month i had three days of pink spotting 3 days that seemed normal but kinda light 2 days of a brown blood and 2 days of a pink and brown discharge just spotting. I been feeling a little weird but i don't know if that's just me being paranoid. I'm kinda scared i might be sick or something. Any information is welcome. Please help :(