When you really want to, you need to cry. There is nothing wrong. This is one of the ways of emotional release, you do not need to accumulate negative emotions in yourself. These are modern tendencies to always be on horseback, to seem like a strong woman. This suppression of one's own emotions can lead to depression and emotional dryness with loved ones. Naturally, you can cry somewhere hiding or on someone close on the shoulder, while maintaining your social status.
Tears are the physiological reaction of the body to a stressful experience; and to a certain extent, crying is a reflex that is almost impossible to control. However, there are a number of tricks that can sometimes help you hold back. The main task is to overcome the stressful experience, to push it into the background. That is, you can either force yourself to quickly start thinking about something else, or feel something else. In the first case, it is good to have a number of memorized helpers - some pleasant memories that you are ready to fetch from memory in an emergency. Sounds too simple, but it can really help. And the second option is to shift the center of experience purely mechanically: pinch yourself strongly, bite, press the nail into your hand. Well, in general, you just need to strengthen the nervous system, there are no other effective ways to control emotions.