False Miscarriage?

Okay ladies so I had a miscarriage, didn’t bleed too much through tampons & it was red but did have some clots Jan 22-25. Doctors said my pregnancy hormones were at a 7 which were low and i was only 4 weeks pregnant at the time. I just found out i was pregnant again and I’m about to be 5 weeks tomorrow and my lines are straight solid! Way more solid than my “first” pregnancy. Could there be a chance that i was having normal bleeding and that Im still pregnant from the first time? Symptoms never really left except tender boobs. Everytime I drank I felt nauseous (i’m a big drinker and I never throw up so i thought it was weird for me) what do you guys think?