Suggest Medication For Eye Infection

i have had a stye about 2 weeks ago and now have an infection in the eye. i cant see much out off it and it is sore with the heat and i work in the food industry. Also lately i have been feeling very tired and run down, one minute i'm happy then the next minute i can just burst in to tears for the least little thing. And in work there is a lot off changes and it is a lot off pressure, as with at home, I'm seperated from my husband who won't leave and i have a new boyfriend, my son has moved in with my boyfriend as he refuses to live in the same house as his dad and to be honest i feel like everything is coming on top off me, and i feel so depressed a lot off the time. And i'm in between 2 house so i can spend time with all my kids as well as my boyfriend. I went to see my gp and they didnt help very much