It sounds like you have a gut flora imbalance that benefits both the strept and the candida. I used to have strept over and over as a child and it got so bad that I had to remove my tonsils. I took every single antibiotic there is on the market and eventually they stopped working.
And here is a fact: you cannot completely destroy the strept or candida, so the antibiotics are not really doing much except reducing their numbers.
If you have a gut flora imbalance this isn’t how you “heal” the body.
I would consider going a different direction and consult a naturopathic doctor who heals people whereas doctors just treat the symptoms, not the cause.