Just to recap - you are on Day 4 of low-calorie (500 KCal) HCG
diet and getting conjunctivitis
like symptoms. I am amazed that you are able to type using the keyboard with such a low calorie intake!
The FDA has not approved this diet and if you are also taking pain killers of any sort (such as NSAIDs like Ibuprofen
etc) the swelling could be related to that,
I would recommend that you get your 'other' medication history properly reviewed to exclude a drug-induced problem. Antihistamines such as cetirizine
10mg (max twice daily) is standard treatment but only when you are on a minimum 800Kcal diet.