Ear blackage and headache ear infection.

Hi A week back water had entered into my ear causing bacterial infection. After severe pain i had visited the doctor and got ear cleaning done and he also prescribed Ear drops-Neomycin sulphate ear drops, ciplox, zerodol and Gudcef. After a day of cleaning done and medication. My pain had reduced and my ear felt lighter with no blockage.I was supposed to continue with my medication ans ear drops. However after 2 days i am feeling a blockage in my ear again and this time internally as even after stretching the ear its not unblocked. Not only that i am having headache also at the back of my head. I am not sure if its linked to ear infection but its quite persistent and started after this infection only. Also i have no cold or throat infection. Please suggest whaf should i do.