My girl friend and I had my OW course on March in Philippines, with similar diving practices. I felt nothing but my girl friend felt ichy after one day. After we get back to Shanghai, she booked a doctor appointment and doctors said it was very slightly allergy to plankton, which had no impact on future divings.
I do not know whether you are the same case but hope the experiences can be helpful to you.
I do not know whether you are the same case but hope the experiences can be helpful to you.