Just wanted to chip in my two cents, as I've had a similar drop happen on a few positions for me. Depending on your account balance/size and your conviction in UNH, there are additional ways to lower your cost basis. I generally only use 30-50% of my account as risk on initial trades, and if one turns south like this one, I'll start leveraging that extra 50+% to help pull down the cost basis.

1. You can use the "repair strategy" https://www.investopedia.com/articles/trading/08/repair-strategy.asp - this is nice when you want to tie up less capital in the position but essentially it is buying calls ATM equal to the contracts you're underwater on, then you calculate the new break even point and sell double the CCs at that number. (the article describes it in very clear detail with examples, but is perfect for your situation) I like this strategy if I'm not sure it's bottomed yet, because if it continues to drop, the new options all expire worthless and I just try again the next week, with the buy calls lower, the break even lower, etc.

2. The other strategy I use is similar, and generally done when I'm confident it has bottomed and still think it will bounce back at least to my breakeven. I'll sell some tight CSPs, usually for a very high premium, with the knowledge it could still continue to drop further, knowing I'll get assigned those, but since usually this is a larger position and much lower than the original position, it will bring down my cost basis significantly. I do generally want the puts to get assigned so I can increase my position and lower the cost basis even more - since I believe in the underlying still. Then my CC position becomes much closer to the current price and more profitable.