Hi, i have a really sore left eye, and a constant headache.?

hi, i have a really sore left eye, and a constant headache. its painfull to look around,move my eye or even to touch it and i see double and blurred when i look left or right, i also have multiple sclerosis and im 10 week pregnant!! its been like this about 4 week now. i already wear gles but there not helping, the only way i can relieve the pain is to hold my hand over my eye. i had an eye test last week and my sight in my left eye has got a step worse but other than that they said that the back of my eye looked fine and i had no scratches or anything. have you any ideas??