The brain tends to heal very slowly, so don't get tied up in knots about this taking a while. It's highly likely that something is aggravating your headaches, the usual suspects are brain stimulants like tv, smartphones, continuous noise, light, caffeine, sugar heavy foods or sweeteners. You need to figure out what your triggers are, which can be hard so soon after injury as the brain tends to be much more sensitive. A supplement regime can be helpful, take a look at the supplement sticky on this forum. Also, an anti-inflammatory diet may help slowly reduce your pain, high doses of fish oil and/or eating meals countains oily fish can help, along with other foods known to reduce inflammation and aid healing.

Nerves take a long time to heal. Keep your chin up and concentrate on your recovery. Relapses are normal. Getting down about it is normal. We have all been there and are still there. You aren't alone.