Just curious because i just had a miscarriage

Hello I'm new to the group...I had a miscarriage August 5th and I stop bleeding about 3 weeks ago...And me and my husband had sex the 2nd week and I took 4 pregnancy tests this week and all of them showed up with a faint line ..I haven't got my period yet after the miscarriage...I'm trying to see could I be pregnant again or else my hcg is still showing up from my miscarriage..I'm so confused could anybody explain this to me if you have ever experienced this before...I'm trying see could I be pregnant again or else it's showing fainted lined from my miscarriage