There do seem to be some horrible virus type bugs around, that either hang on for weeks, or morph into something else, or leave you so debilitated you pick up the next horrible virus. Maw is right Nannyliz, if you feel ok for however many minutes that allow you to post here, it is unlikely to be flu. I've had flu twice in my life. You can't move, just lie in your bed. I was sent off for blood tests when I had flu, just walking into the blood clinic almost did for me and is a complete blur. My companion actually held me up.
Sorry for being dramatic and do hope you feel better soon.