bumpfee should bump your fee up to the recommended fee and subtract the amount for it from the amount being sent
type ./litecoin-qt --help and you should see a flag -reindex...if not I know its in console and the command line flag works if you start litecoin-qt like that...not sure if it is listed under command line/terminal option however...
you can do a reindex and rescan from console as well
I dont think you'll see a "path" for reindex under --help in terminal
just start litecoin like this:
./litecoin-qt -reindex -rescan
after you bump the fee of course