Hello there, The limited description that we have here tells me that you r not feeling strong on an emotional level. Now this may be either due to an overwhelming stress that has happened to you or there is some decrease in your capacity to handle  previously usual stress. Either way suffering is undeniable and that may be causing the breakdowns. If the mind is not able to control negative thoughts it starts affecting our emotions negatively and that negativity influences our behaviour too. We start judging ourselves when we look back at our behaviours and thus increasing the burden of emotions further.