ugghhhh any suggestions??

 Long story short, currently a college student, have a lot on my plate right now, keep forgetting to take birth control pills, have had unprotected sex with boyfriend 6 times since the removal of the implant, which was 2 weeks ago. Haven't gotten my period yet, have taken multiple pregnancy tests and all have been negative.  I have been feeling different lately, been getting dizzy out of nowhere, get weird stabbing stomach pain, sex drive has definitely gone up..yet still negative results! Definitely not trying to get pregnant, but wondering if there's a chance that I might be. Is it still too soon to tell? Should I wait a bit longer to take the tests?