How can I stop myself spinning mentally?

Finding an online support group or doctor could be the key to getting you out of the depression without having to leave home yet. A simple search online will help you find one or call your insurance company to ask them to refer you to one.
I wish you the best, I understand how your feeling and I hope you find the inner strength to get yourself out. I feel you can do this!

Hi, Miss Root!
You have to be the one to take the first step as hard as that may seem now but professional counseling and possibly medications are how you'll climb out of this hole. Modern technology is now providing telehealth services right on your computer or phone with virtual visits so you may not even have to leave your home until you're ready. Contact your health care provider or an online referral service like ZocDoc and you may want to narrow your search to psychiatrists. Your local pharmacy may even be able to deliver your medications if needed.
You have it in you to do this for yourself and your family! Take that first step and you'll be on your way.
Best regards and I hope you'll be feeling better quickly.