If I were you, I'd just continue with my 5 RM, even try to increment beyond that. There are some exercises that it is possible to negatives on if you are creative. Chins and dips, for instance, are easy to do negatives on when you are alone and both are very productive when done in a negative fashion.
Anyway, if you decide to just keep going, then do so, but make note of what your new 5 RM is when you reach that. If you want to go beyond your 5 RM, you could use clustering to work up to your 2 RM or thereabouts.
I would include either dropsets or burn sets about now as well, if I were you.