Itching and Group B Strep ?

Hey guys, FTM here. At my initial visit to my OB, she did a urine test that came back positive for Group B strep and put me on oral penicillin and said she’ll retest it at the next appointment and give me IV antibiotics when I go into labor.

Since starting the penicillin I’ve had itching *down there*. Is this normal of GBS+/penicillin treatment for it?