Minniea if you are just 3 months out from radiation you probably are still "cooking". Kind of like when you take food out of the microwave it still cooks for a while afterward. Sounds kind of gross, but the radiation still works for a few weeks afterword.

Then the rule of thumb around here is side effects for a time of every month per week of radiation. So if you had radiation for 6 weeks, then figure on side effects for 6 months.

You're not going crazy, all of us experience the same feelings for a while after treatment.
Bob S