What Causes Pressure In The Head Along With Pain In The Eye?

hi on Friday morning I woke up good and when I was at mu job I bend over and I feel some pressure on my head ad a little later I was walking and when I look to the outside my left eye hurt and part of the same side of the head hurt too and I was feeling a little sick kind of running nouse a little and in the afternoon my left eye was red and when I left work the sun was painful to my eye it was dripping water from my eye so I went to the pharmacy and bye opcon a and my eye clear when I put some drop but I still feel like a little itchi and like if there something inside my eye like I can see it , please help