miscarrige?

im 5 days late for AF i did a pregnancy test the other day which had a faint positive.. waited a few days to retest and when i did the test came back as negative i used FMU with all tests.. ive lost all of the pregnancy symptoms i had (nausea, head spins, hunger, sore breats, super sensitive nipples etc) could i have lost the baby but my body hasnt expelled tge tissue yet?