I would suggest changing your focus to another subject. Balance is extremely important when taking the IB tests. For instance, I decided to go with english, history, biology, and chemistry for my HL’s and wished later that I would have substituted one of my sciences with an HL art. It’s all so overwhelming that you really do want one HL that is the lesser evil. I still got my diploma with all those HL’s, as did all of my friends who took those that you are taking, so don’t second guess yourself there if that’s what you’ve decided. I just think that a break in the system is good too.