We have artex ceilings in the hallway and under stairs. Survey report on house said asbestos may be present. For some reason, we never followed it up. The ceiling under the stairs has been disturbed from accidental knocks to it and where it was partially broken already, it crumbled more because of these knocks. I remember once breaking a part of it away, and it crumbling, before thinking I should stop, as it would be a pain to re-plaster. We even drilled into the ceiling to install a smoke alarm once. 

A recent conversation made me think I should check the report on the house, which I have tonight. It's an old Victorian house, and that is when I saw again that there is a risk if asbestos in these ceilings. We will be getting an asbestos specialist in immediately to find out for sure. We have lived here for a year and a half. The ceiling was disturbed between a year and 6 months ago. 

I know all might be ok, and only the specialist will be able to tell and then the GP can provide further medical advice, but I am now quite worried and I am just looking for some reassurance. If it is asbestos and we have well and truly breathed it in on two occasions, and then lived in it for a further 6 months - year, is this length of exposure a severe risk or low risk? I have tried searching for answers on how long the exposure has to be before it is harmful, but have only got vague responses of 'many years', but maybe it's not known. If anyone does know from experience or knowledge, I'd be very grateful for your thoughts.

Thank you.