Braxton Hicks at the SAME TIME every night?

Haley

I have Braxton Hicks every night. Usually (but not always) very shortly following my last meal of the day and I'm always lying or sitting when they begin. They're very intense (cone belly) and I normally get 4-6 in an hour and then they stop. My doctor couldn't explain it. Anyone have any idea why they'd start at the same time every night?