Needs help with a swollen cut ?

I am 14 years old and I have been cutting myself for six months . I cut because I want to control something which I have just recently discovered . I cut myself yesterday and now it swollen I have already disinfected it the cut is in my lower abdomen where the hair grows . Should I be concerned it's really red and swollen ? I would just like everyone to know I am never going to cut again 8 hours of no cutting so far .