Hi,
How are you? It is good that the MRI was clear. This narrows the differentials to primary headaches such as migraine, cluster or tension headaches. These can be managed by rest, ice packs, avoidance of triggers and prescription medications. Persistent or recurrent colds or runny nose may signify allergic reaction or sinus issues as well and you may also benefit from ENT consult. Take care and do keep us posted.
You need to be seen by a doctor sooner than months down the road. Are you here in the States? If so, you can get in to see someone quicker. You may very well have brain and spinal damage. I don't know because I'm not a doctor and you need to see one, soon!
follow up. i have neck and back pain too. it seems like a spinal or nerve pain sometimes. thank you in advance again