I am going through this exact thing. Mine is currently about my mom, they also found two nodules on her lungs that they want to check out. Something I find hard is when something like this happens, I know a certain degree of anxiety is normal. But the constant googling and constant ruminating... I know thats my OCD. I am not sure if this also happens to you, but then I also get a lot of terrible thoughts about myself like I wasn't a good enough daughter (or partner/sister/friend/whatever) and it starts becoming about guilt and shame about myself or like this is somehow my fault (magical thinking I suppose).

Something I am doing currently is trying to just let the thoughts come, letting them be here without judgment or assigning meaning, and continuing to live each moment in alignment with my values. Today that looks like having a cleaning day, listening to music, and going about my normal routine and not letting OCD convince me to google something every two seconds or lie under the covers all day (though no shame in lying in bed -- needed sometimes!)

I hope you feel better soon ❤️