People going through DEPRESSION are overly emotional. Depression develops the tendency to bottle up emotions, but those emotions don’t disappear. Instead they overflow at the slightest inconvenience. If someone becomes volatile over small things, it could be because depression overwhelms them with emotions. They might cry, become angry or even have an emotional breakdown in response to something. Most people would normally brush-off.
If you are going through DEPRESSION, talk about it & consult a medical professional in worst case. We all have been through this, everything in your life good or bad pushes you towards your purpose slowly but surely.