Think I’m giving up

This was my first semester at college and it was hard I started off so wrong and it got so deep that I didn’t know how to bring myself up again. I had to change my course for math, I had to drop chemistry and I ended up with one a and I think the rest are C the part that gets me is my bio it was the only class I felt I got but I’m very bad at taking test especially this professors because she makes her test so tricky or she gave us question on something she did not mention. I did not know she had a policy where you have to get a 70 or higher on a test or she automatically charge any grade to a D and I’m in that situation now. I feel like a failure I don’t know what to do. All my life I’ve wanted to be a doctor I knew the workload and I was ready. But financial problems came up and I had to work, my mental health was at its worst and most days I couldn’t even get up and I was raised in a strict household so when I got that freedom I did go crazy for a minute. I just don’t know how to get back up I don’t know how to handle being so dumb and such a failure. I don’t even know if medical school is an option at this point and I don’t really know what to do and how to do anything and I just feel like it’s putting me in a place I don’t want to be in and I’m just scared.