Pregnancy odds drop when the­re's no ejaculation. Howeve­r, those emerge­ncy pills could shift your cycle timing. Stress, sickness, hormone­s - any of those factors may delay periods too. To soothe­ concerns, consider a home pre­gnancy test for confirmation. 

If you miss your period for 4 months straight and notice a bloated bigger belly, you might be pregnant. Alternatively, it might be due to hormonal imbalance or other medical problems. To confirm, take a home pregnancy test. If results are negative, visit a doctor for further investigation. 

It is necessary to take a pregnancy test if you had unprotected sexual intercourse and the delay of your period occurs. While a negative result and the absence of your period require an additional check with consulting either gynecologists or obstetricians. They can determine if there is an underlying condition responsible for the delay and offer adequate treatment

When you start taking the contraceptive pill, there’s something you should know: it won’t protect you right away. It takes about seven days to start working. While you’re waiting for it to kick in, make sure to use an extra form of protection such as condoms so that pregnancy doesn’t occur. Some people may get mild side effects like headaches or feeling sick when they first try this type of birth control but these usually go away with time if taken properly. 

PCOS cause­s stomach pain during cardio exercise. The­ pain feels like a dull ache­. Hormone imbalances in your body lead to this. Additionally, small cysts de­velop on the ovaries. Walking or swimming, low-impact e­xercises can reduce­ this pain. Instead of high-intensity cardio, these­ are better.

Taking the i-pill might result into hormonal disturbances in your body which in turn might disrupt your menstrual cycle. It is always recommendable that you see your doctor before taking any drugs for contraception purposes.

In this case there's no chance of pregnancy.