yes, physical illness can seriously exacerbate your mental health issues. 3 years ago, i had a bad cold that lasted a week and i was stuck wide awake for 4 days and 4 nights. it sure put a whole lot of cobwebs in my head that i had work them out. i was in remission with my ptsd and it was flared up by that. but it went away again as i got better. i was run down for a month due to the lingering effects. it takes awhile for your body to recover, so you're going to feel pretty run down for awhile.