Start of summer flu?

Ok, I'm feeling sick.  What's going around? Is it flu, or something else?
Tossed and turned with heartburn for several hours last night.  It was so bad I felt like I would vomit - literally... mouth tastes like metal and that watering that comes before throwing up is eminent.  It still hasn't gone away. Headache!  Big one.
Last evening I had tightness in my chest that started in the afternoon, accompanied by neck, shoulder and arm pain... I'm sure that's the start to the aches and pains that normally accompany flu and spreads throughout the entire body.
If I didn't have so much to do, I would crawl back in bed for the rest of the day