The questions of InCharge should have made you already think of possible causes for your vomiting. Like intoxication (chemicals in the water, metal or plastic from the pot you boil it in), pesticide from the non-organic produce, BPA from the can if you had not-fresh-coconut water;; Electrolyte imbalance.
There could be few options, all depending on what is your heart and respiratory function. You may try to do dry fast 8- 16 - 24 hrs. Or get distilled water. And/or get organic produce, juice it+ water, as you did and just sip on it - 1 sip per 15 min or less. Sea Salt in bath/feet soaking/or in your water.