Periods and yeast infections…..

So some back round info, I am on Nexplanon. I have been on it for about 5 years and honestly I really do like it. It did completely change my periods from being 8 days every month to lasting 20 days and being 56 days apart but I’ve learned to deal with it. I don’t have heavy or painful periods either. But back in November I got strep and taking the antibiotics gave me a yeast infection. Now every time I have my period I get a yeast infection. I can normally catch it pretty easily or before it gets bad. I just wanna know is this normal, or what could be causing this.