i am 25 years old male,, experiencing now sores all over my mouth and throat,,this makes it difficult to swallow that i have not eaten for days now only water,,this started with sore throat, not painful as it is now,,then itchy redmarks on my skin starts appearing measles like which lasted only for a day,though the itchiness continue until now,,the next day tiny blotches on my lips, and sores on my gums, tongue, tonsil and throat appears, whcih eventually become bigger, gargling a betadine sulotion is painful at first but makes me my mouth and throat feel numb, so i often gargle to clean the infection,this already happen to me twice,,last was 4 months ago, and that 4 month ago the doctor told me it was a viral infection, this time i consulted another doctor and told me it was allergy which is new to me since what i eat the day before this illness happen were what i often eat and got no sores, earlier this year my blood was screened and found negative to HIV,please help me im really worried tell me what to do,or please explain me what is this,,,im really worried