I started a new job as a midwife 3 weeks ago and the unit is awful, really really poorly staffed. I can't face going back there, am in tears at the thought of having to work another shift there. They haven't given me a contract yet, do I still have to give 4 weeks notice or can I just not go in? Am sat here in tears and feeling really panicky at the thought of work which is not like me at all.