15 weeks postpartum misscarriage or pregnant? Bloods and pregnancy test came back positive but had period for 9 days

Hi all I went to a&e last night as I have been having really horrible pains in my left side and hurts when I’m just breathing / walking / bending over ect so they done bloods and says everything was fine until I mentioned about my bleeding ( I will be 15 weeks postpartum on Monday ) I bled until about 8 or more weeks postpartum was put on antibiotics to try stop the bleeding which it did then maybe 2 weeks later I had my period again which lasted 15 days then came off for 13 days then on for 9 but 2 of those days I was only bleeding when I wipe but nothing on my pad. So they asked me to do a urine test and pregnancy test and it came back that my pregnancy test was positive so (possibly having a miscarriage) so he asked to do more bloods and full blood count which I did and it also came back positive for pregnancy so they said they will call me in the morning to do a scan to see how far I am ( haven’t heard back from them yet ) they said otherwise it will be Monday ) could I still possibly be pregnant ? Or am I having a miscarriage

I’m going to buy a pregnancy test myself and see what it says thanks.