Im truly sorry for this major setback, @Bowser. The symptoms you have could be coming from irritation of your vagus nerve as it controls the gastrointestinal system. I don’t know if it could also be causing the pain in your neck & scalp though. It is curious that you felt good for a couple of months & suddenly your symptoms came back worse.
I believe your styloids are plenty short enough that they are most likely not causing your symptoms. Different surgeons have different philosophies about how short is short enough when respecting the styloids. Some only shorten them back to normal length (2.54 cm) which can be enough but in most cases isn’t. Some cut them back o 1-2 mm which is extremely short but is not always possible for every patient due to the location of the facial nerve as Dr. Aghayev told you.
If you’re able to get a FIESTA MRI of your vagus nerve to look for damage or compression of it, that could be helpful.