flu like symptoms or anxiety

I have symptoms that feel like the flu (got my flu shot on October 17). I've also been serverly stressed for the last 2 months and I just don't know what this could be. I think every thing with my body is a problem so I'm probably a hypochondriac, therefore more stress, so could this be all anxiety? Also, does anyone know good coping mechanisms besides yoga and breathing? Or things they do to relieve stress? Thanks🤗