Hi Renuka!!
From your post, it seems you are desperate for a break! Give your mind and body a break of around 7-10 days. Give the notice period to the company to finish it off. Then, take a break and start searching for a job; that's a better idea.
I won't suggest you go on leave and search for a job because:
1) If, in case, you get on leave for 5-7 days, then think, what if you don't get a proper job in these 5-7 days? You would be in trouble again.
2) The worst scenario would be if you appear for an interview, everything goes well. Just think, if a reference check is done with your present employer, you would land in trouble.
So, just think before you leap :)
Good Luck
Regards
Jacky