I asked to go home early last night.

So, I work night shift. Tuesdays night I started to feel really bad. I was about to get sick, but I finished my shift anyway. Last night, I planned to call out because I was not feeling well. But I woke at 9:45 pm and I have till 8 pm till call out. So I show up to work and asked my supervisor if it was possible I could go home early. He told me to wait till see how things were that night, and four hours later he allowed me to go home. I just worry because I have work there only 7 months. I have call out four times because I have been sick, and I have been late a couple of times because sometimes I get mandated, which means I have to stay for first shift l. It could be all shift or just a few more hours. After a few mandations I overslept a couple times. I was always sincere about it and told the true. I am about to get fired?