JaneMc, sorry for your loss. It is hard to lose someone and hard to not express your feelings to them before they die.
Sometimes crying is just grief expressing itself.

Sometimes I feel the tragedy of other people and what they go through.

If you feel the burden is too heavy, you may consider a therapist or grieving support group. If you feel devastated and unable to cope with life then a psychiatrist could try medicine to get you back to a point of coping.
Please feel free to keep in touch through P.C. here again. Many people are compassionate and share your grief.