Come on, get a grip! Of course it's a risk. Life is one big risk. You could avoid most risks by just staying put in your house and not doing anything. Oh, don't boil a kettle, as every 1.5 minutes someone is burned or scalded in the UK
https://www.humanics-es.com/burns.pdf
The biggest risk you run all the time, I would imagine, is driving. There is a one in around 270 lifetime risk of being killed in a car accident. Best stop driving then.
Do you take Paracetamol? Better read this then:
https://www.bmj.com/content/350/bmj.h1186/rr-0
I suffer from a medical condition that has a risk of occurring of around 1 in 100,000 or so. Maybe it's best for you to stay at home and diminish that risk?
You an see my drift here. You're becoming needlessly anxious. The risk of blood clots is vanishingly small compared to virtually everything else you'll do today. The benefit of saving you, your friends, family and the wider community from a terrible death, or long term medical problem as a result of developing Covid 19 far outweigh the risks. If you want read more on risk analysis:
https://www.hsph.harvard.edu/ecpe/critical-risk-analysis-daily-lives/
Stop reading the headlines and get on with living your life!