one am sorry to hear you've been feeling down. FWIW I had a terrible weekend, on Sunday I felt completely and utterly low and thought maybe I was getting depressed, then cried a lot as I said... felt awful yesterday morning again, nearly cried in co-op, and at the childminders (and cried on the phone to DH at lunchtime still thinking everyone must hate me) but I am so much better today. In fact, i haven't cried at all today! What am trying to say is that it could so easily be hormone related and lift any time. Or it could be more than that. I also have the Rage a lot, particularly in shops, and even if i know it is my fault because of my huge pushchair I still hate everyone and think they are all thick and ugly. 
Doesn't mean it is hormones, though I do wonder if you will feel better after the scan?
Ah well, I am not officially submitting until NYE, but this is my first proper attempt at getting the whole thing together and analysed Properly. Am nearly there, all the chapters are edited to death they just need to interlink and sound PhDish :) I will be working tonight!
sheldon dishwasher vodka is all over MN! I can't really describe it but it is a bottle of vodka, filled with sweets/choc/spices of your choice and then put in the dishwasher for it all to melt and infuse into the vodka. Apparently that's how they make flavoured vodkas! so that's my sis and SIL sorted :) I am going to make curly wurly flavour, and skittle flavour vodkas! exciting.
dont worry about the guilt, you have to do what you have to do! It doesn't really go away for a while but once you are back at work and they like going to nursery you will be fine. and anyway, it is a long way away yet and nice you have it sorted so you can just enjoy the baby without trooping round nurserys at a later date!
AFM - I am changed! I have managed to plan and cook hot, nutritious meals for my family three nights in a row (even started tonight's this morning)! it is huge that I can plan food and still fancy it later on! AND this evening I feel good :) Normally at this time (after 4pm) I feel like death and playing with DS is so difficult cause I just want to curl up on the settee and sleep. But i am fine! wheeee.