Hi, Sometimes, you need to dig deep to find your inner strength - remember the tough times that you have already been through and how you survived them. This will give you the confidence that you have the inner resources to cope with the future.
Sometimes, you need spiritual help. If you are a Christian, you may like the following from the bible. ............“I Can Do All Things Through Christ Who Strengthens Me”- Philippians 4:13. There are many scripture readings people choose to live by, one of the most well known bible verses that is often quoted is, “I can do all things through Christ who strengthens me.
Don't worry about other people and how they are appearing seemingly confident, many times it is all show. Don't compare yourself to other, build your inner resilience.
I also like another quote from the bible "If you have faith as a grain of mustard, nothing will be impossible for you".