Red throat and blocked ears. I do?

I am having red throat, and blocked ear..i tried valsalva maneur but it didn't help ..I get blocked ears very often ..even when i get very very little cold.. I once got to see a doctor he checked my ears and done varoius test..which all result in normal...they also done frequency test in which i have to hear the highest and lowest frequency..(i forgot the name of test) which also normal, And then i got to a MBBS doctor.. I told him the conditons he checked my throat..and said your throat is very red..and ear problem is causing by throat ..he prescribed medicines ..i completed the course but nothing happend.HE check my Throat when i was normal ,means i don't had any cold.. But my ears were blocked.he asked me if throat remain same red all the time , and i Said yes .. Because it was like my normal throat..and i didn't feel any hurt or sore in my throat . I am having blocked ears after every 1-2 months. What should i do?