I had sex 5 weeks ago this Saturday, I was suppost to start my period 5 days ago, I have yet to take a test because I don't want to freak myself out which I'm sure I already am. I have fuller breast that are tinder, cramps under the bellybutton and on my right side under my rib cage, sometimes I feel as I'm going to get sick, and I have lower back pain along with headaches and always feel dizzy and tired? Should I take a test or am I just trippin? Please help.