I have a headache, though I m unsure if it s associated. I was diagnosed with mononucleosis via a blood test 3 weeks ago. I also actively have a sinus infection. I m just concerned because I just had this numbness in my hand that s lasted for about 10 minuets. It started in my pinky finger, then traveled to each finger. One after the other, and after it moves to the next finger, I get feeling again in the previous. It s gone from my pinky to my thumb, and my thumb s numbness is currently going down. I also had a light indigestion like feeling briefly.