Friend, I am sorry that Benji is not feeling well, I am certain this must worry you. But, as you may have suspected it is possible this could be related to the mop water. You see, the ingestion of mop water with fabuloso can cause gastrointestinal ulceration, abdominal pain, vomiting, etc. this certainly can explain his symptoms. Or, there could be something else completely different like ingestion of a foreign body, pancreatitis, infections, etc. to name a few causes.
In this case, unfortunately, we are somewhat limited as to what you can do at home. I would strongly recommend having him checked today by your family veterinarian for a hands on examination. In addition, he may need supportive care like IV fluids, GI protectants, etc. If cost is a concern I would look into your local ASPCA or Shelter where they often offer veterinary services at a lower. In the meantime this is what you can do:
1- Do not give things like Pepto Bismol or Imodium. Start him on Pepcid AC (famotidine) 10mg 1/4 tablet every 12 hours for the next 5-7 days. You can buy Pepcid AC over the counter in any pharmacy.
2- Change his diet to rice (50%) and boiled boneless chicken or ground beef (50%) 4-6 times a day. Keep on this diet for several days then wean into regular diet.
3- Follow up with your family veterinarian for a hands on examination.
My goal is to provide you with excellent service - I hope I've provided the information you were seeking, if you feel you have received anything less, please reply back as I am happy to address follow-up questions. Kindly rate me when you are done.