Hey Merk thanks again.
I didn't sing much for last two days so to get rid of that pain. For 2 last days I did only your isolation exercises and eee's and stuff like that. So today I tried to sing a bit and I didn't have so much pain as before.........still I didn't sing as much as before only for 30-40 minutes........I did have some kind of irriating thing in my throat but it wasn't as painful as before. So, for a week, I'll try to do more exercises rather that singing.
And also, sorry for a noob question, but what is acapella?