Oh, don't be daft. It doesn't all have to be about me just because I asked for someone to talk to! Will take my mind of things for a bit anyway
Don't beat yourself up, you've been through a lot and I think at the moment you just need to be nice to yourself for a bit. So what if you've put a bit of weight on ... once you're ready to start to shift it, it will come off again. It will only delay you getting to your target by a short while in the scheme of things, so from that respect it's not really wasted time.
Having control of your eating will be easier when you've had time to grieve and get over the m/c. Right now things are still pretty new and I suspect pretty raw, maybe you just need a bit more time. Just don't get too down on yourself about your weight right now, I know sometimes it's easy to use it as something to focus on to take your mind off other things, but I really think you just need to be kind to yourself for a while.