Using Metronidazole Vaginal Get while four weeks pregnant

Patient: I am four weeks pregnant. Before I found out I was pregnant my doctor prescribed Metronidazole Vaginal Gel because I have BV. But I haven’t used it yet because I am scared because I have been reading stuff online about it and it can cause miscarriages, it says. Now, I was just wondering if I should use this or not? I am just making sure.