has this happened to anyone? :(?

sorry if this gets long! last period 6/13. unprotected sex 6/24. (not ttc until end of the summer, but stopped bcp's in april). was going out with friends on 7/8....took a test because if, by chance, i was pregnant i didn't want to drink. faint (+) sign. 7/9, am, tested negative. took a billion other tests over 3 days and got + and - results. was 2 days late for AF. got blood drawn, got my period, found out HCG level was 7. DR. said i was never really pregnant because when i conceived it never implanted, and it's not technically a miscarriage? told me I never would have known if i hadn't tested. has anything like that ever happened to anyone? I'm pretty bummed over what could have been, but I guess I can't be too upset over something that was never there, right????

thanks for reading!!!