Asbestos - would heating spread dust around?

I work in a building built towards the end of the 1960’s and completed in 1970. London.

I was told the place had been stripped of asbestos, however, the place has been suddenly shut down at the end of my work day. It has not reopened.

I had no idea why, they said heating and ventilation system issue at first.

I then get told it was asbestos wrapped around the heating pipes in the room I’ve been working in and now testing is being done, a few that are back have come back clear so far. We have put the heating on so I’m worried it would’ve spread around the room though the vents? Does it work that way?

I’ve been working in there since the end of April, 8:30am-5pm Monday to Friday.

I’m panicking but I can’t change it now. I’m wondering if they’ve come back clear so far if I’ll be okay. I’ve read horror stories online, so just trying to understand the facts but the workplace isn’t telling us much.