I Thought I Had Food Poisoning After Eating Sushi. The

I thought I had food poisoning after eating sushi. The next morning I had extreme nausea and vomited only once. I then developed a severe crushing headache from my forehead to the back of my neck. Throughout the day I became very fatigued and begun to have blurred vision. By night time joints began to ache to the point it brought me to tears.
I have had no traumatic event. I am a healthy 46 yr old female.
I am a paramedic and not one to run to the clinic with every minor ache and pain. I have a high tolerance to pain and very seldom even take over the counter analgesics.
Today is day 2 I still have the crushing headache blurred vision and nausea have increases
Any ideas what's causing these symptoms