Aww Pain. So sorry to hear that you are in so much pain. Sometimes when you feel crap, the best thing you can do is sleep if you can and are able to get the time.
I know you may sometimes feel like you want to end things, but if you take every day just one at a time and don't act on your suicidal thoughts, then you could look back one day and realise that it was a good idea to not act on those feelings. I'm not saying that you should ignore them because obviously you can't, but it may help you to accept these thoughts are happening and you can't run away from them.
WRT your eating, in order to take a step forward, you could write in a diary each time you get major hunger pangs to see if there is a pattern to your eating. For example, you may find that after a week of recording when and how much you eat, that you get major hunger pangs, say, around 10am, 12pm, 3pm, 5pm, 7/8/9pm etc IYSWIM. You should keep note of the date, time and amount you eat for 2 months as this will help your GP and other HCP's you see. It could also help you readjust and control your eating habits in very small steps that are barely noticable and so your brain will get used to you eating a little less at certain tiimes. It's like swapping one habit/routine for another IYSWIM.
My day has been alright. Was panicking over not starting my English Literature assignment, but I needn't have worried as I have to read a good bit more of the beek before I can start. I also made a chocolate cake for DD's birthday party. Was nice to get baking again as I haven't done it for a good while. Apart from that, all's fine here.