This is a fairly straight forward chart and there's plenty of room to get creative with chord variations and such. With that being said, I believe the chords are all correct and sound perfectly fine as is, as well. :)

Intro: C#m    A    F#m    C#m  B (x2)

Verse 1
C#m                A           F#m
When I walk through deep waters 
                            C#m   B   C#m
I know that You will be with me
                A            F#m
When Im standing in the fire
                  C#m   B   F#m
I will not be overcome
                           C#m
Through the valley of the shadow
E           B
I will not fear

Chorus
           E
I am not alone
           B
I am not alone
              C#m
You will go before me
                A
You will never leave me

Verse 2
In the midst of deep sorrow
I see Your light is breaking through 
The dark of night will not overtake me
I am pressing into You
Lord, You fight my every battle
And I will not fear

(Chorus)

Bridge (x4)
     A
You amaze me
Redeem me
     B
You call me as Your own  

Verse 3
C#m               
Youre my strength
     A              F#m
Youre my defender
                       C#m    B   
Youre my refuge in the storm
C#m
Through these trials
       A
Youve always been faithful
F#m                      B
You bring healing to my soul

(Chorus)