These numbers are only a bit above the normal range. If you knew how normal ranges were set you’d take (most of) them a bit less seriously. Mine were slightly elevated when I was younger. Certainly dehydration is a common cause of H&H elevation, but probably not yours. You’ve been through a rough time, and I’d expect it to take a while for your numbers to settle down. Is your doctor concerned? You could check it again in a month or two.