What happens after a positive PCT

[notacooldad]

Me and a few colleagues are all poorly. I took a few days off last week feeling ill. I had taken 3 lat flows but all negative. Dh was positive on Friday.
I've just done another test. Still negative.
Is it worth going to a centre for another test?
What are the rules around work if you are in close contact with someone with covid. That is, I know I'll have to go off sick but is there a minimum period of isolation in place. Does the 'ping' notification in place still operate.
I've not expressed myself well, I'm fuzzy headed at the mo!!!

All of the guidelines are on gov. Uk clearly spelled out - why do people come on Mumsnet instead?

All of the guidelines are on gov. Uk clearly spelled out - why do people come on Mumsnet instead?
For confirmation that I had understood things correctly catfunk you will see in my first post I was fuzzy headed. I wasnt processing information clearly and MN was an easy way of breaking one info down for me. That's why I posted!