Stressed - Attorney grievance

Just looking for others opinions. Im an estate Administration Paralegal (probate). I have a file where mom died and all the siblings hate each other. We are almost finalized with the Estate and we are just working on the financial accounting. I'll admit the estate has been open for a while and one of the siblings (not our client) has been hammering us non stop to get this accounting done. Fast forward to now and this person has filed a grievance against my attorney and the firm. I have so much anxiety that this is my fault and I am not moving fast enough. Granted our client is horrible at communicating and doesnt get me the information I need to finish this accounting. I still feel like I should have pushed him harder so it didnt come to this. We are so close to filing the accounting and im worried im going to get fired for this. We have been communicating with our clients sibling who filed the greivence prior to the filling and have updated them on the status of the accounting multiple times. Im just scared about what happens next...