Worried/confused

Chelsey • 18, pregnant with first👶 cant wait!💞
Im almost 11 weeks pregnant. When i was 6 weeks i had a little bleed and had a scan, there was a heart beat present etc however ever since the. I have been so scared. When i first found out i was pregnant the lines on the test were really dark however i did one this morning and they are faint but positve, midwife said dont worry due to me not bleeding or feeling any pain.. So what is it? Why the faint line at 11 weeks?