does anybody else get stressed out and worry about something and then it puts you right into depression?

I just started taking lamotrigine and the stress of life seem to be something I dont need right now while im starting this new med to stabile my moods.

My son and his gf are fighting and they have a baby and im worried about the baby cause the mom is only 17 and my son says she has been mean to him lately because shes mad at my son and she keeps throwing fits and fighting with other people too and I love my grandson with all my heart and im so stressed out and i think i could be going into depression because of all this turmoil.

I know its their issue to deal with but it makes me sad , my son works 2 jobs and is in the reserves and he is doing a pretty good job with everything and i adore his gf and im gonna fall apart if they break up.

I feel like I could just cry my heart out right now !!