In the practice of meditation, it is common for your emotions to become more apparent. This is a normal part of the process. If it's possible to stay with the emotion as it arises, try that. Be curious. Practice refraining from identifying the emotion as one that is "positive" or "negative" (judgment) and instead, acknowledge to yourself, "I notice I am feeling [insert emotion: sad, happy, grateful, joyful, angry, etc.]"
Sometimes emotions that arise during meditation may feel like too much — if you need to stop your meditation, that's okay too. The more we come back to the practice of meditation, the more we develop the muscle to notice these emotions, identify them, and stay with them in the meditation.