Hi, I understood your worry regarding your most importent system of body as a mother to be. Just now nothing is serious. But if you will go on giving distortions to it by medicines(hormones supported by advertisement)  every now and then, it may invite incurable entities like endometriosis, endometritis leading to high or low menstrual flow, irregular ovulation, infertility etc., So do not make frequent unidicated hormones. Most probably you may improve with time if not harbered above mentioned conditions.Wait for 2-3months and if not improved consult your gynecologist.