Hi, i had a look to see what other things you've mentioned that might help point you in a different direction than MS......i honestly think what your dealing with is 'most likely' related to the problem being with your peripheral nervous system because you have mentioned multiple things that are all related to Peripheral nervous system issues (ie alcohol, weight, activity, desk job, poor posture, female, menapausal age group, ) and peripheral nervous system damage is a lot more common than MS spinal cord lesions are but regardless you'll definitely need to have a few tests done before you'll get a better idea on your diagnosis so try to not worry about having a neurologial condition like MS when there are many other much more likely possible explanations to match your history and symptem, so stay open minded about whats causing this.
Hope that helps.........JJ