Unfortunately carry-on restrictions on many non-US flights are a pain to deal with when the objective is to travel with a fair amount of equipment. Make that film equipment and the need to bring your film onboard only compounds the difficulty. I've been shooting 100% digitally for over a decade and can't imagine going back to travel with film, therefore much respect to those who continue to do so. (I once had a 4-month trip to Europe in my youth for which I carried onboard the plane several hundred rolls of film in its own backpack 🙂. It was my first 'big trip' and didn't realize I could actually buy a lot of that film cheaper in Europe, particularly E-6 with processing in Germany...)
In any case, another strategy is to carry as much gear as possible on your body because coats and items in pockets (of 'photo vests', etc.) are not restricted by weight or size like carry-on bags. I have successfully done this with super-tele lenses when the lens in a Pelican case was otherwise overweight.
A possible tactic is to use a bag that will carry everything but will of course be overweight. At points in the airport process where you may be asked to weigh the bag, arrive with enough gear out of it, but in your pockets, around your neck, etc., to keep the bag underweight. This may also include the gate itself, which can often be the 'last line of defense' by airline staff intent on enforcing restrictions. Once on the plane, pack your gear back in the bag and stow accordingly.
While it isn't possible in many situations, consider booking on a US carrier because carry-on restrictions will be much more generous than carriers from many other countries.
Anyway, I hope you're successfully reunited with your equipment and still have time to use it on your trip!