Yes, I Have A 10 Year Old Physically And Mentally

yes, I have a 10 year old physically and mentally handicapped son. Who has a lot of problems. But he has been sick none stop for almost 3 months now. We have brought him to see his Dr a few times and she keeps saying it is his bad allergies and fluid behind his ears and puts him on more allergy medicine. But it never gets any better, it continues to get worst and now I am coming down with some of his symptoms too. he has a bad sore throat, his little ears hurt, he has a cough and sneezes on and off. he says it hurts when he sneezes and when I barely touch his throat. He stays with a headache, his little nose stays stopped up, he stays with a low grade temp and sometimes rises above 101. He also gets sores in his little mouth, ect. Can you please help me to figure out what is wrong and what to do? We are very worried about him and hate seeing him sick. Thank you for your time and God bless!!