Am I still pregnant after bleeding?

I found out I was pregnant on Friday and started bleeding on Monday. I went to the hospital, and they said they could not tell if I was having a miscarriage because im still early 4 weeks and 1 day. They told me to go back in 3 to 4 days to see if my HCG levels are going up or down. I took this pregnancy test this morning while im still bleeding, and it came out positive. Could it be possible that im still pregnant, or will it stay positive for a while if I am having a miscarriage?