Sea Lice in Belize?

Hi there, My family and I are planning an escape to Belize in April. After a few VERY bad sea lice experiences, I am feeling a bit nervous. I am going to stock up on Safe Sea, but I am highly allergic to the little buggers and am wondering if anyone has experience with that time of year down there. (I am allergic enough that I have to skip the St. Croix Coral Reef swim next October because my doctor thinks I need to let my immunity build again.) Thanks in advance!