Pregnancy confusion..poistive and negative test?

my last period ended on the 27th of february and i had sex on serveral occasions after that with my boyfriend. for some reason i got the feeling i wasnt pregnant so i took a home preg. test and it came back positive although the plus sign was faint it was clear that it was a positive so i took another one but it... show more my last period ended on the 27th of february and i had sex on serveral occasions after that with my boyfriend. for some reason i got the feeling i wasnt pregnant so i took a home preg. test and it came back positive although the plus sign was faint it was clear that it was a positive so i took another one but it came back negative i went to a clinic and there test came back negtive. why did i get a positive at all in the first place and should i go to the doctors to get a blood test. or is it too soon tell or should i wait until i have missed a period which should be anyday now... but i am not getting any pre period sign. im confused and need help
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