When you get new hearing aids, it can take your brain a good few days - upto a fortnight to adjust to them. Far too many people get these, put them in, and find it difficult and then decide that 'these are not for them'. THis is very silly and short sighted.
If you have not had any of hearing aid previously, then start off with just having it in for a couple of hours at the most on the first two or three days, slowly lengthening this period they are worn.
Even when existing aids are adjusted - it can take two or three days for your brain to catch up - so things like ticking clocks, footsteps, etc suddenly sound very loud. But within a very short time this will cease.
I have needed to wear aids for hearing for about twenty years now. ALways NHS ones, and I am so very appreciative of this wnderful audiology service, which is still part of the NHS which operates in the way it should - totally free at the point of use. I have seen these aids get smaller and smaller and at the same time more and more effective.
My recent regular check-up showed further loss of clarity and all the technician needed to do was to re-progamme my existing aids which took just a few minutes. Wonderful.