I have 2 little afta or urcers in my troath, is that infection, redness around?

Apthous ulcers? it sounds like u r telling me u have apthous ulcers which are painful and can be large and painful enough to make eating too painful. I don't know what your HIV status is b/c in my positive patients they can get these on a regular basis. u do not need have HIV to get these. We don't know what the causative agent is. in order to make diagnosis they need to seen by ur physician.
Not an infection. It is believed to be immune response to some stimuli. Stress , trauma, nutrition, lack of sleep etc. it is not contagious. Not infectious. It will go away without treatment. You can treat for symptoms. .