@mioz - Sertraline doesn't get rid of the OCD, but it reduces the associated anxiety, so it's more bearable.
My son's OCD started when he was about nine: he began counting to himself when he put his shoes on and would have to repeat certain actions over and over till things felt 'right'. Then he started worrying about contamination - food poisoning, catching illnesses from unclean plates, etc. The OCD got worse over time, until he had therapy with a psychologist who'd trained at the Maudsley. She did exposure therapy with him, where she encouraged him to tolerate the discomfort of doing the things that scared him. It worked really well and he wasn't bothered by the OCD again until Covid. Now it's back and worse than ever. He's in his 20s now.
OCD appears in all sorts of different ways. I have two friends with it: one has to clean her house from top to bottom every evening, no matter how tired she is; the other has the hand-washing type, but has overcome it through therapy.
From talking with my son, my 80-year-old mum has realised she has it too. She just never had a name for it before. She's learnt to live with it, but she's relieved to have discovered it's a recognised condition. For years, she kept it to herself because she didn't understand what was wrong or why she had these thoughts and compulsions. She thought she was the only one. At least now she knows it's a treatable condition.
Treatment is usually effective, although it involves hard work and determination. However, a good therapist will support you through all that. Waiting lists for treatment aren't great, so if you can afford private it's worth considering. It won't be cheap, though.
I think either OCD-UK or OCD Action offer free support groups which also give guidance in how to combat the OCD.
Please seek help. There's no need for you to suffer like this.