Thanks for your question on Healthcare Magic. 
I can understand your concern. 
By your history and description, possibility of 
herpes labialis is more. 
It is viral infection. Your upper 
respiratory tract symptoms are also favouring herpes infection more. 
So better to 
consult Dermatologist and get done clinical examination of lesions. 
You have not taken anti viral and this is the reason you are not improving since four months. 
You will mostly improve with 
acyclovir tablet 200 mg five times a day. Along with this, also take 
pregabalin and methycobalamime combination. 
Apply ice packs on affected areas. 
Don't worry, you will be alright with all these. 
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.