That happened to me on zoloft... I felt "numb" like you said. It almost felt like I was in a daze.. like a fog. This may because the medication is too strong... I would definitely report the mood change to your doctor... He would know the easiest transition that could maybe adjust the dosage.
Stress can give me big mood swings, and it sounds like you are down because of the stress you have been under.
The best thing that you can do.. is get out of the house. Instead of lying in bed, maybe go for a walk... it will get your mind off of things. I know its hard to get up , but when I was depressed that helped me the most was going on a walk and looking at different houses and flowers that people had. Even if it was like only 10 minutes , it calmed me down... and I felt accomplished after wards.
As for anxiety... I had panic attacks... I felt like I had to escape... I felt suffocated and when there was a lot of people it made it worse. With a crowded house it may do you some good to just go for a quick walk if you can. Give your mind sometime to relax.
You need to appreciate yourself. Because you have done alot!! You are asking for help, getting help, which is good, and taking care of kids!!
Kids are kids... they will pretty much do what they want and they are not thinking of anyone but themselves. When I was younger all I was thinking was of things that I needed , wanted... they will not understand until they get a little older and have responsibilities. I don't think that any children realize how much their parents do until they have to do it themselves. I own a house , I pay bills, I am 24.
When I was 10 I was thinking of looking cool for my friends, having a social life... and when I younger then that ..pretty selfish acts. I think its pretty normal for children to do that, but you might want to give them just a few things to do or get them into after school activities.
You need you time without kids, and you deserve it. Everyone deserves some time for themselves, and it is not selfish at all to want that for yourself, because kids do it all the time!