hi, i just seen my doc today because I have been sick for 5 weeks straight with cold and flu symptoms but they are getting worse and I noticed bright red blood in my stool and was wondering if maybe i have an infection instead of just the flu. i was diagnosed with sinuses and received 10 days of antibiotics and took all the meds but now my symptoms are back......sore throat, cold sweats all the time, extreame fatigue, headaches and sore neck. Any advice would help.