I would wait until you've missed your period. I took three tests before my period was late got a positive then two negatives. then when my period was two days late i got a positive last thursday so now i know for sure. When i was pregnant with my daughter i waited until my period was a day late and got a positive. Save yourself some money, frustration, and just wait i know its annoying but it's best and if you don't trust the home test then make an appointment you'll know for sure!
Best of luck to you.