Can my work do this to me?

I work at a company that has a point system. I took a day off work last Tuesday because I was really sick. I was suppose to get a point for that. I didn't realizing that my points that was suppose to go away never did. I didn't take time off for two months. The policy does state that if you go two months without calling in the points are suppose to go away. I still have 3 points and have not got a point for that day I took off. So today still feeling sick and I went to my doctors and they did give me a doctors note to take today off because I had a bad sinus infection and told me I needed to rest. I looked in my handbook but it never clearly stated that I would get a point for having a doctors note. The policy is that if you get 4 points you get a day suspension. How long can they take to suspend me. They've been trying to tell for a week now that I would that one point and get a day suspend but it has not happen. I have been trying to use my vacation time for three weeks now but they keep denying me. I have three days worth of vacation time but not letting me use it. How am I suppose to get better if they are making me work over time on my days off. THIS IS TOTAL CRAP!