Please take advice from flatlined and saje’s posts.
Please disregard whatever usedtobe has said in this thread. I haven’t encountered posts by him/her in any of the animal related threads I’ve posted in, but the cat handling methods posted in this thread are nonsensical and can cause vertebrae and/or disc separation for the cat. As a professional animal handler who has worked with thousands of cats over a decade, I would never handle any cat this way, and I would fire anyone immediately if I saw them grab a cat by the base of the tail.
Follow what flatlined mentioned, and my addition to that is to wrap the back end with a thick towel or blanket to keep the rear feet from shredding you. Around here, we call it a “kitty burrito.” But really, that’s just for handling a cat that you need to “do” something with, like give medication or trim nails, and only if the cat is being highly resistant, not aggressive - that’s a whole other topic.
For two cats posturing/fighting in the home, I like Springtime for Spacers method. Aggressive handling of the cats is not necessary and probably nonproductive as far as long term behavior modification. They will just learn to be afraid of you. Throwing a blanket over one of them will break eye contact between the cats and diffuse any posturing, and give you a chance to shoo one of them into another room with a shut door for a while. Never put yourself, hands or feet, between cats that are fighting. They’ll just shred or bite you, too. Always use a largish object, (I like a collapsed cardboard moving box) to put between them (the blanket idea is good, too), break eye contact, and push one or the other away to another room if needed.
For most housecats who are normally used to each other, a couple days should be all that’s needed. The behavior you’re experiencing is normal. If the one that got out is injured enough, he may need a couple of weeks. If you can keep them separated, it won’t hurt to do it for longer, and you can do positive reinforcement with playtime and treats around he shut door, plus swap them periodically for some territory sharing before a full re-introduction.
OP, I hope you home becomes a place of peace once again, soon! Feel free to PM me if you need specific advice, too. If I can’t immediately answer a question, I have a behaviorist on hand who I can ask first.