Confused as hell. Can anyone help?

hey I’m new to this.. but about a week ago, I tested twice and two faint lines came up... then as I was due on my period, I came on what I thought was my period. A lot of bleeding for 4 days, no clumps just a few little clots. So 3 days after finishing my ‘period’ my doctor Said to re test on monday (today) and there Was two really dark lines ( will try link a photo) does anyone think this is miscarriage hormones or does anyone think I’m just pregnant and had a period as well? Please help. X