Hello. I Have Been Feeling Exhausted, Stomach Pain, Swollen Glands,

Hello. I have been feeling exhausted, stomach pain, swollen glands, hiccups a lot....headache...for three days. I did do some weeding of my garden, so maybe I overdid some of the muscles, but I've been having some pain there. I was stung by something up in Maine on the beach behind my knee, and it is red and dark blue and sore more than itchy.