Hi I'm 18 And Idk If I'm Pregnant I Took

Hi I'm 18 and idk if I'm pregnant I took over 9 to 10 pregnancy test and they all say positive and I took 3 cheap pregnancy test those came out negative and I never missed a period since August august was the day I had relasions and was on my period when I did it and September I had my period on the 2nd threw the 6th idk what to do