I have been noticing over that last several months that my posture is getting really poor.

I'll catch myself being VERY slumped over and straighten myself back up. It's been happening so frequently, that I'm wondering if it is related to the MS. I used to have, not perfect, but pretty good posture, and feel that posture is important. I hate that I am losing it this way. I don't know what to do about it.
Does anyone know if this could be related to the ms? ...and what to do about it. Thanks!