To work or not to work?

Hi guys I need some advice. I lost my job in June, I got a new job in July but after all the checks that I needed and because of the coronavirus my checks have only just come back complete. (This will be working for the NHS) They have gave me a start date for the 9th of November but since my interview in July I found out I was pregnant and I am currently 18weeks pregnant by the time I start work I will be 21 weeks. I haven’t told them that I’m pregnant yet as I didn’t want it to ruin my chance of not getting the job but now I’m worried that the virus is getting worse and I’ll be at risk of catching it due to working in the community! On the other hand being in the house all day whilst my other half is at work is boring. So I’m wondering if I should start and work for a couple of months just pass time by. What’s everyone’s opinions? X