I am sorry to hear that you are feeling this way. :(
But hey, you made an amazing accomplishment there, and i want to say, congratulations!!!! Sober for a month with no desire to start again!!!!! Keep it up, you are building yourself a road towards getting better. It may seem like a small step, but its in fact huge one, trust me.
I also, when i go to sleep and just lay in bed, i also think about many things, that is bad and it makes me feel sad usually, but its in human nature to overthink before sleep. Let go that past, you already started building a path to better tomorrow, now get rid of that chains that bind you and be free. If you feel like talking things off, i strongly suggest visiting psychologist, it can help you out in sorting out those bad emotions that pop up.
You will get better, i have no doubt there.
Stay safe, best wishes.