Uncertainty

I will admit. I am feeling uncertain about the future. Usually I am quite happy to rely upon the Lord and be at peace with what is ahead in life. I have lived that belief and felt quite confident in that faith.
Lately, that faith and belief are being tested. There are people and things in my life that may be here today and gone tomorrow. That is a reality I see so much in my work. I see it in the lives of others but haven't thought much of my own life and family being affected.
Roles seem to be shifting and I'm not comfortable with it. There are certain things that I feel responsible for and others that seem to be assumed by other members in the family. What if they aren't there anymore or are unable to assume those roles? That is where the role shift comes in. There is more responsibility and that's not something that was in the contract of life I signed up for, was it?
I know this note is vague and I guess it is intended to be. I need to rely on the Lord's strength in this and every area of my life but I am finding there are moments in my day that I get thinking about things and realize I'm afraid of what may be ahead.
I need peace.