My latest OCD fixation is a legitimate risk and it fucking sucks
This is not a reassurance-seeking post.
So in November, I handled an old ww2 gauge from a bomber plane (B-24 liberator). I like planes, and it was ten AUD, so I bought it. Sadly for me, I realised that it was painted with radium paint. Now, a lot of these older gauges are well-known to often 'leak' contamination. I was also given a radium-containing toggle switch, which I put in an open-topped plastic bag. Because the museum I purchased the gauge at had no soap in the bathrooms, I could not properly wash my hands there. I bought, prior to going home, a glossy book and parts of my car. Anyhow, fast-forward 10 months and I can't:
Touch the back seat of my car,
Touch the book,
Touch the books sitting next to the 'contaminated' book,
Touch things on my desk, where I put the open plastic bag before stowing it more safely,
Touch my bathroom doorknob, because I touched that before I washed my hands,
Touch the doorknob of my granny flat, where I put the book.
I also can't touch my computer without washing my hands afterwards, because I touched it after touching my charger, which was at my desk.
How do I stop this? I can't keep on going like this, it's taking a toll on myself and my family and has made me borderline suicidal on at least one occasion. Thanks in advance.
TLDR: handled radium, what do I even do now?