am i having a miscarriage?

hi guys, this is my first post. slightly confused but after 18mnts + ttc were pregnant, well we thought we were well it it all started fri 22 sept cramping n light blood but not my period as i was on 2 weeks previous was is so much pain i thought i was going through labour lol. well anyway i go see a nurse on thurs 28 to check whats happening she did 2 pg test and both came up with a faint line, so she said she would send the urine off fo be tested and didnt wany to do any swabs incase, since then i have done 5 hpt which have been positive even though im still bleeding(no clots) yet when i called doctors earlier for my results they were negative. also haveny had no cramps in a week and nipples are still sore, im just really confused x