Never Had a Headache Like This ... Any Suggestions ?

I have been having this headache now for 10 days now. I recently moved to a new place where i did nearly all the heavy lifting by myself. When i was done my back hurt really bad but i thought it was just because i had not done anything like that for a while. 2 days later i woke up with a headache kind behind my eyes which hurt more when bending over or shaking my head. Well, 10 days have gone by and the headache is still there. Its no longer behind my eyes, nor does it hurt when sitting around. the only time it bothers me is when i shake/nod my head. the pain is in the back/top of the head. I have noticed my neck and shoulders are tight and stiff feeling and my back a little as well. I went to the doctor and he gave me some antibiotics and decongestants to see if that does it. I have taken them for 3 days now and it doesnt seem to be helping much. overall the headache doesnt affect me, infact i dont notice it much unless i make sudden movements with my head (mostly up/down nodding). i have had people mention sinuses, eye strain, allergies, meningitis, herniated disc, tension headache, etc... Any suggestions or personal experience with this type of thing?