Yep, it is hard at times and yep, I do rant and rave at times.

I think you need to try to get some order to your day - write things down and make a plan for the day and stick to it. tell your teenage DD that she has to pull her weight around the house to give you a hand - even if it is only her bedroom and making sure that her clothes are out to be washed - it is better than nothing. Find something for your 5yo DD to chanel her engery into instead of chanelling it into your 3yo DD and ask her why she is grumpy and lashing out at her sister.

Your 3yo DD is normal with the wet nights, but you could try to lessen it by not giving her a lot to drink after 5pm - only small sips of water. And put some night nappies on her so you don't have as much washing to do, adding to what you already have. try and talk to her when she is giving you the hand to find out why she thinks that she can do that to you.

Let your baby eat with the family - she may make a mess (or not) but she will at least be happy. Why can't she play outside? is your yard not appropriately fenced? Try to set up a play routine for her so she knows she can have x amount of time outside and then its inside playtime. With the night feeding, are you happy to do it? If so then feed her - its not unusual even for a child that age to still want to have a drink overnight. If you don't want to Bf her then give her a drink of water or milk in a cup.

Finally, I think you may need ot seriously look at whether you need to go back on meds again because if you can't function then neither can the rest of the family and it may be easier to deal with a lot of the issues you are having when you are in a better headspace.