My PhD is based upon a specialist piece of equipment that has broken. I've sent it to USA to be fixed (there is no technical support in the UK). It has now come back with another error. It has been out of action for 3 months meaning some of my data has not been collected at a crucial time as my study is longitudinal. Subjects are supposed to be tested every 5 months and this has not been able to happen. It is time dependent as they take medication and have to have the effects evaluated. I can't stop thinking about it. I am not sleeping, worrying the last 18 months has been wasted.