REALLY need advice about 8 yr old daughter

Try to keep it short and sweet.

My daughter is 8 and my son is 9. They both can be extremely difficult in different ways and easily feed off each other negatively.

My son does have impulse problems Im working on and he thoroughly enjoys irritating/fighting/hurting his little sister. But as I said they are improving and it’s being worked on.

Now my daughter has OCD and is very emotional. She’s gotten into the pattern of crying every day over the simplest of things, which in turn only makes my son want to lash out more and have the behaviors he has. Uuuggghhhh.

I’m at my wits end ladies! I love my babies so much but I feel like I’m at a breaking point and I don’t have a lot of resources to get the MUCH needed break I deserve to be a better parent.

Any advice or outside insight would be greatly appreciated.

Thanks in advance