frequent periods

Good morning ladies! I contracted chlamydia months ago was treated for it then went back because I thought it wasn't gone got treated for it again turns out I no longer had the infection when I took the second set of medication since that month I've gone from getting my period every 28-29 days like I have since I was 9! To every 19 days!! I feel like I am becoming anemic and I'm wondering if my period will regulate itself back to my old cycle? Has anyone had anything similar happen to them ?