I Been Sick For Quite Sometime Now, Since March 6th,

I been sick for quite sometime now, since March 6th, 2015 and I am pretty much feeling the same symptoms. The first ENT doctor that I went to said that I had laringitis. He didn't prescribe my anything and told me to not talk, drink a lot of water and rest. The second doctor said that I had bacterial Sinuitis. He then prescribed me an antibiotic. I've tried to rest, take the antibiotic and other over the counter medicine. Since it all started, my voice has gone in and out but I feel like I have it back today. However, I am still feeling the same symptoms of runny and stuffy nose, less energy, sinus pressure and headache. After taking the antibiotic, it really didn't help me at all. Right now, I want to get back to feeling better and start exercising but I just don't have the energy to do so. I am wondering if all of this has anything to do with allergies and I need to know what I need to do next.