@Poppy67
You have very high chances to get rid of your Tinnitus if you have indeed a lot of fluid in your middle ears (behind the eardrum). When fluid is present in the middle ear, which should be air filled, not fluid filled, that fluid is pressing on the the inner ear, and pressing on the inner ear leads in the end to the sensation of sound. Because the fluid is pressing continuously, we have the sensation of the sound continuously, symptom that we call "tinnitus".
Once the fluid is taken out, this problem should disappear.
Fluid can leave the middle ear taking one of the two directions:
1) through the eardrum, by making a cut in it and suctioning the fluid through that cut or by putting little tubes into a hole made in the eardrum through which the fluid can drain, so by "invasive procedures", as cutting the eardrum is considered invasive, or
2) through the tubes that are connected to the middle ears, called Eustachian tubes, which are supposed to ventilate and clear the middle ears, (but now they don't because they are closed because of an inflammation), when the E tubes will be opened again.
The specialist will tell you more and decide how the fluid will be taken out.
You shouldn't have taken this long to go to a doctor. Maybe you didn't because you couldn't, but now, that a specialist will see you, the chances to get the problem solved are very high.
Good luck!
Try in the meantime to chew chewing gum, the often swallowing promotes the opening of the Eustachian tubes.