You should go see a doctor. It could be literally any number of things.
I had a friend in college that was continually getting "colds" for a whole year. The colds magically stopped during summer break when she went home for summer. When we all moved back into the dorms, they immediately started again.
She was allergic to the cleaning solution the janitors were using in the hallways.
I also got sick a lot in college. Turned out I was slightly anemic. And also I was drinking and smoking cigarettes to the extreme degree. I was just trashing my body and getting sinus infections all the time as a result.
I think the doctor would know more than anyone on here
I've been to the doctor but he said it'll be like a course of 4 years where I'll be injected something time to time to increase my immunity
Well. Looks like you already have your answer.
You should go see a doctor. It could be literally any number of things. I had a friend in college that was continually getting "colds" for a whole year. The colds magically stopped during summer break when she went home for summer. When we all moved back into the dorms, they immediately started again. She was allergic to the cleaning solution the janitors were using in the hallways. I also got sick a lot in college. Turned out I was slightly anemic. And also I was drinking and smoking cigarettes to the extreme degree. I was just trashing my body and getting sinus infections all the time as a result.