Early research is starting to show a relationship between inflammation in general and OCD. To me it is not surprising that Covid (which causes inflammation) can trigger symptoms of OCD. Often treatment involves treating inflammation. It is hard at times to find the “smoking gun” with PANS. You can try a PANDAS/PANS doctor: https://pandasnetwork.org/. Often part of treatment is anti inflammatory medications (like NSAIDs- motrin).