Possible pregnancy?

Hi guys im new here so please bare with me :) me and my bf have been ttc for 6 months now. Im 22. My periods are fairly regular usually the same date every month if a day or two out. Its 3-5 days late now. I experienced a little bit of brown blood which lasted for an hour. This happened like 2 weeks after i finished my last peiod. My nipples have also become really sore all of a sudden too. I felt fine at work today and came home ans randomly threw up. Can anyone give me their thoughts before i tell my bf and we do a test?