It sounds to me like you are seriously congested. I sincerely believe a plain water enema could get you out of trouble! It is a very simple thing to do, well worth learning. If you are puking lemonade, that is not normal. Is it the taste of the lemonade? If so, perhaps juices would be better suited to you. If it is not the taste, but your system pushing it back up the pipes, that would indicate congestion below! The acid reflux gives me the same impression. You need to take care of that, and let the lemonade flush through! You will be amazed how good you feel when you get your colon cleared.
Is it because of the cayenne? If so, take the cayenne separately: either mix in a small amount of water and shoot it down like tequila and chase with lemonade, or get capsules. My naturopath has me do capsules, one cap 3x per day with lemonade. I have done this for years and prefer it to drinking it in my juice.