After working ten night shifts, I am now am so bleary-eyso tired that I could sleep for twenty hours in a rowstraight. After working ten night shifts, I am now so tired that I could sleep for twenty hours straight.

bleary-eyed literally means having bleary eyes, so it's only really used to describe someone's physical appearance. "I now am" is not wrong but "I am now" is more common in speech.

She has always been so level-headed; she could probably run for mayor's office with thisat thick skin. She has always been so level-headed; she could probably run for mayor's office with that thick skin.

Selling the rights for all its natural resources gave the country some short-term cash. Selling the rights for all its natural resources gave the country some short-term cash.

But it had the knock-on effect that they now haved to pay very high prices for oil and water from private companiesto private companies for oil and water. But it had the knock-on effect that they now had to pay very high prices to private companies for oil and water.