MISSING BAGAGE

I have travelled on 2nd january from chennai to doha and from doha to newyork, and then I have to travel boston thru JetBlue airways. but our flight get cancelled and reshecduled to sunday 5th jan, but its also cancelled again and resheduled to wednesday 8th Jan. here the problem is, when we checked with Jetblue representative, they said they are not received my lugage. I am not clear, whether my luggages reached my final destination boston or it is missed some where else.?? Pls advise on how to reach my luggage.