"still workin' on those bugs" is really pretty useless. I'm not suggesting you're not a disciplined person but at some point, debugging something for days on end is a sign you may need some help, a fresh set of eyes, or come up for air and re-group. Same goes for feature development. If a single user story representing a whole feature (or part of a larger one) goes on and on and on, that's either a sign you perhaps rabbit-holed it too deeply, need some help from another team member, or need to raise a flag and split the story into another piece, possibly even one someone else can rally around to help close it.
At a past job a very technically strong coworker spent months on a problem and eventually threw the towel and handed it to me. It took me another couple months to find a reasonable solution to it.
Some problems are _really_ hard and no amount of help will get a dev to solve it faster.
