I am a 57 year old white female with a diagnosed active mono reactivation which causes my blood platelet count to be down. I saw my chiropractor yesterday and left feeling great. My visit to him may have nothing to do with the pain I am experiencing now. Several hours after my visit I attended the movie theater and was in the recliner for 1 and a half hour or so. When I got up, I all of a sudden felt a sharp pain which kind of felt like a pulled muscle up under my rib cage on my left side. It has bothered me all night and this morning. Although it feels muscular, I can t imagine how I could have pulled something just sitting in a recliner! I see this is roughly the location of my spleen. Should I go to a doctor, or just treat this like a pulled muscle? I take no medicine for any other condition. I am 5 4 and weigh 185. My job keeps my moving all day. I am a happy person by nature and thoroughly enjoying life, except for this mono reactivation!!!