Should you be worried? Postmenopausal women should pay careful attention to bleeding after sex. Routine Pap smears and pelvic exams can help you catch some conditions early. It can make it difficult to get pregnant and can cause irregular periods and bleeding. During this time, the cervix will have increased blood flow, which can easily lead to a little spotting. There are many things, aside from pregnancy, that can cause a light period. The color of period blood can range but is typically red or, if your uterus is shedding off old tissue, brown. Thankfully, many IUD users eventually have lighter periods or no periods at all. The blood is flowing, your mood is swinging, and your cramping uterus just confirms what you already know to be true. A pregnancy test is performed for women of reproductive age. Late miscarriage, placenta previa, placental abruption or premature labor could be the cause. Special tests like a Pap smear or cultures may be ordered. Young women who have just started menstruating may also have lighter periods, or missed periods. Managing your stress in a healthy way should help your spotting subside and your menstrual cycle go back to normal. If your uterine lining has been injured, they may advise you to avoid sex for two weeks. The cause of vaginal bleeding or spotting requires a thorough history of the symptoms when the bleeding or spotting is occurring and any associated symptoms, birth control methods, and history of any medical conditions or infections. During the first trimester of a pregnancy spotting or bleeding can be an indication of a miscarriage or an ectopic pregnancy.