Good afternoon. To get started, calm down, read about drugs for people with this disease. For example, here hivprep.org/stribild-vs-truvada/ you will find what you need and it will help you live on without problems.
I think you should take some supplements and maybe supportive meds. I recommend that you have a look at Canadian Pharmacy, for example. I think it is a really good and trusted service which you will like a lot. good luck with it!