No period, no pregnancy symptoms?

Well, there are many things (besides pregnancy) that can delay your period. Stress is one of them. Sometimes we're so stressed out that our body decreases the amount of a hormone (GnRH), which causes us to not ovulate or menstruate. A sudden, short illness or even a longer illness can cause your periods to be delayed. Perhaps you're trying a new medication and a delayed or absent period is the cause? Being overweight or underweight can hormonally shift your cycles and even stop them.