Altitude sickness comes in several forms, the most dangerous of which is life threatening pulmonary edema - your lungs fill up with fluid, effectively drowning you while on dry land. This is to be avoided. If you start wheezing and coughing and gasping for breath and feel totally exhausted, even at rest, you are in big trouble. Seek medical help right away. The most effective treatment is to go downhill as fast as possible until you can breath again. There is no way to predict who will suffer this. Even experienced climbers can succumb on Mt Everest. Fortunately, life threatening altitude sickness is rare, but milder forms of altitude sickness are not.
The most common form of attitude sickness is shortness of breath, and at 10,000 ft., you will get it unless you live in Leadville, CO. Next most likely, affecting about 40% of people, is a splitting headache. We have found by experience that Ibuprofen works best among OTC pain killers for altitude headache. So apparently does coca tea. Worse but still not dangerous cases include headache, nausea, and vomiting.
Also, and here is bad news, avoid alcohol and drink lots of water or juices. You will not sleep well at night, and booze magnifies the effect.
It takes months for the human body to fully adjust to high altitudes, but the symptoms described above abate in 3-7 days. Hang in there and load up on Ibuprofen and coca tea. Take lots of pictures, for coca tea will hamper your memory of what you saw. If you are lucky, the worst thing you will experience is shortness of breath with exercise, exercise here defined as the effort needed to climb three or more steps.
And while we are on maters of health, lay on the sun block. Less than 20% of the Earth’s atmosphere is between you and the sun at this altitude, making the sun far more powerful than lower down. Wear a hat with a wide brim and long sleeves.