"All will be well" is a comforting phrase that basically says you are putting your trust and faith in a Higher Power (whatever you choose to call Him/Her/It) that everything will work out, even without you knowing the details of how it will work out. This does not mean the road will be easy, but it does mean you can get through whatever comes your way. It means you acknowledge your strength, resiliency, and your own faith. It means you believe you deserve good things and they will come to you when the time is right.
If you are struggling and you feel like all will NEVER be well, stop and breathe. God did not bring you this far to drop you. There are things going on behind the scenes you are unaware of. Breathe, pray/meditate, and TRUST. Take it one moment at a time if you need to. That moment can be as small or large as it needs to be. You define the length of the moment.
You can make it through this moment, just as you have made it through many other moments, and you will make it through many more moments. Savor the joy and happiness when it comes and remember those positive feelings in the tough times. It may take some time and it may be difficult, but all will be well.
Love & Light,