Debilitating headaches back?

[Nackapan]

On every other day Injections at present. 4th week. (After loading dose in November)was making improvements slowly and starting to do more round the house. 10 min walk a day. Even driven a short distance to surgery. Since this regime on average had a headache 7-10 days. But last 4 days have been awful again. Movements make me worse and back on painkillers. Having plenty to drink and eat and still in bed overnight for 10-12 hours as retreat easy because of light sensitivity. Sets my head sizzling and makes me walk unsteadily. Only thing different is my ferriton level went from 61 to 39 in a month. Any ideas? I will try them . ? Could it be too many injections now?? I used to get a headache the day after an injection but this subsided. I'm waiting to see an eye specialist for the light sensitivity. Glasses I need to wear feel so so tight (they are not? )fed up as on so many pain killers again . Any ideas appreciated