Violent Spinner!

Question
I have two budgies, Spinner (blue) and Patch (green)
when I got them, they were with my aunt, who gave them to a trusted family to babysit, but their children ripped out the birds feathers. They were frightened of my sister and I at first, but soon became very, very, friendly in loving in the same day. We took them home and were very attached to each other. I hate to say it, but we had them in a small-ish cage, and didn't take them out as often as we should have.
Spinner was always the nicest and would sometimes bite but never hard.
Patches could, and would bite very hard, sometimes braking skin, but both of my birds (female) never hurt each other. Patch took it upon herself to protect Spinner! They kissed often.
But recently I took them out of their cage to fly around.
Spinner was the only one to come out of the cage, and as soon as she did he flew into wall after wall after cuboard after wall. She wouldn't let us touch her, and it was hard to get her back into the cage.
It's been about, a week, maybe two since then, and Maybe it's because she bumped her head, but recently I looked into the cage and saw blood literally ALL OVER THE CAGE. It was splaterd, and we still don't know where it came from.
But today (the next day) I came home and saw Patches had feathers ripped out from another fight(a huge patch our of his head) and her tail feathers and wing feathers were Broken  and mangled but she was sleeping. My dad says she fell asleep as soon as we put spinner in another cage and she slept all day. Spinner is acting really weird and angry. If you come near the cage she tries to bite you, normally she'd run away.

I'm really scared that we can't keep her anymore. I had to have a dog put down from cancer and I really don't want to do it again, not for being violent. Please tell me if there's anything I can or should do. I'm so scared for Patch, but she woke up a few hours ago and is now the one running away. Please tell me if there's anything I can do for Patch, thanks.

Answer
Oh no, poor little birds!  It's pretty normal for them to be kind of skittish.  Keep them in their cage, for their safety and yours.  You may want to separate them until they get over the stress so they don't take it out on each other.  Keep them close enough to talk to each other and become friendly again.

If the feathers are damaged, they can sometimes bleed.  If they're still bleeding, dust them with a little flour.  It sounds weird, but it can help clot the blood.  

The feathers will grow back.  I would buy them some vitamins to help them get the nutrients they need to replace the blood and feathers they lost.  

To help with the stress, keep things quiet.  Maybe turn on a radio nearby so they don't get lonely.  At night, cover them with a sheet or blanket so they aren't frightened by things around them and can rest.  Keeping them warm and comfortable can help too.  Humidity can help them feel more comfortable, and help them sleep.

Let me know if there's anything else I can help you with!