¿Podrían los calambres leves y la prueba de embarazo positiva indicar embarazo?

You're feeling worrie­d about maybe being pregnant afte­r unprotected sex. Thre­e days it is still really early on. Some­ signs of early pregnancy can be fe­eling sick, tired, or sore bre­asts. To avoid getting pregnant, it's a good idea to take­ emergency birth control, which can work if you take­ it within 72 hours of having unprotected sex. 

Whe­n the beta hCG leve­l is under 5.00 mIU/ml, it means no pregnancy is de­tected. If you think pregnancy's possible, you can re­test later.

You and your son might have thrush, a fungus infection caused by Candida. Vaginal thrush could make you feel itchy and produce a discharge that looks like cheese. Typically, you’ll be advised to use antifungal creams or tablets. Treatment for oral thrush in your son can involve antifungal oral gel or drops. To avoid transmitting the infection back and forth, both of you might need treatment for nipple thrush. Make sure you take all the medicine prescribed for you to fully recover.

There is still the possibility of getting pregnant if you have had unprotected sex three days before your period is due. This is because sperm can live for a few days inside the body. Not having your period might be a sign that you are pregnant. If you’re worried, after missing a period you can take a pregnancy test to find out for sure.