I received botox in my forehead about 4 weeks ago now. Everything was fine until about 7 days after my injection. I have been nauseous 9n and off, but the worse thing has been anytime I exert myself I get severe headaches behind my left eye. Tylenol/migraine meds do not dull the pain at all. The only change in my life has been the botox injection. Has anyone else had this issue? If so, how long did it last? Did you try botox again and were the results different?