I changed my title not long before it had to be in, but mine was in three sections and it only affected the third section (my question was too open/unanswerable and I wanted to have two sides to argue). Do you have a new title in mind? If so and you think you'll be more motivated with the new title then do - you could always record it all and justify the change in direction - come up with 3 or 4 reasons why you changed.
On the other hand if you have no idea of a new title just aren't sure you want to do this one, then i would stick with it. You chose it for a reason and you just need to put the effort in. 35 pieces of research is an awful lot though - not sure I had that many and I got 49 out of 50. Get on Google scholar and see what you can find. See if there are any websites you can use. I also bought a few relevant books secondhand from ebay.
What is your current title and what are you thinking of changing it to (if you have a new title)?