I had a couple problems with one adjustment, one was with vision --the other I can't remember, lol, it's been awhile. It was when it got upped from 300mg to 400mg. I'd been taking it for at least a couple of years at the time, at various dosages adjusted from time to time.

Anyhow! When it was split into taking it 2 times a day (200mg in morning, 200mg at night), instead of all 400mg at once, the problems went away right away. It may well not be the case for you as it is a much lower dosage, but it's something to consider. Hope it irons out for you soon.