I got a rank of 4623 with marks 131. I think there is something wrong with my rank. Am i right?

Its muoet. According to last year stats the rank should have been around 2.5k -3k. 

See every year rank varies with same marks as of previous years trends it all depends on how well other candidates have performed and what is difficulty of paper so the rank which you have got by them is correct and you might also get the seat in college as many candidates apply for safety. So that if they don't get one college they could get into other so wait for counselling and wait till last rounds of the same Best of Luck you might get your preferred seat and branch