hello i am not in your position so i really dont now how its best to cope but my sister has twin girls (now 4) and and older boy (now 6) and to be honest IMO she still feels like you do however your DH sounds great and she only get a little support due to her DH's workload etc. Her kids are also handfuls to say the least and always have been. I think the only way she survives is by having lots of help. I am 1/5 kids in my family and 4 of us girls so she is lucky she has so many sisters 2 of which dont have kids and love spending time with their Nieces and Nephew. She is also coping better this yr as the girls have started Kindy. Do you have anyone who could commit to having them maybe one day or a few hours a week. I know even with just one and been pg i need a break every week even if only for an hour to have a shower in peace etc. Do you think maybe you need to see some one and could be a little depressed? I know my sister suffered (still does) PND and is on anti depressents. Not for every one i know but maybe something to look into if you are feeling really down.
Sorry I personally am not much help but i wanted you to know you are not alone.
:hugs: to you