OP, I used to be a Childminder and have been through my support resources to see if I can make suggestions for support.
Mind have a Web page called "talking therapy and counselling", which includes details of free or low cost talking therapy with charities. They may also be able to suggest some advice of how to seek help if you call them.
If you have an employer who offer an Employee Assistance Programme it would be worth investigating.
There's a website called No Panic and they have a free telephone helpline where you can talk to someone. They also have lots of relaxation techniques on their website.
Netmums offer a parenting course if this is something you might find useful, although it seems to be temporarily paused at the moment.
Help Guide have a web page called "emotional and psychological trauma" which includes details on how to deal with trauma recovery.
I have more specific support but I don't want to include a lot of irrelevant info.
I know the above isn't really what you need but may help while you are waiting for your GP.