Here's what I'd do:
Because you have a call of nature several times per day, you can do this often. It's easy and should be highly effective over time. Time will be your enemy if you don't have a strong desire to get this done. Complete resolution make take you several weeks. I would count on at least two months to see complete retraction, but that's going to require daily attention of several stretching sessions. When you can, hold the stretch for several minutes. Use a clock, for almost no one can keep track past about three minutes. Shoot for five, twice per day, with numberous little tugging sessions each time you pee.
The odds of having your foreskin make it all the way back where it will get momentarily stuck are actually pretty good, so a condom is very much recommended until you sort this out. Having that happen creates a lot of anxiety, and it could hurt too. Beyond that, the frenulum could be torn, causing lots of bleeding.
Please try this and get back to me on how it's going.