If we made a sub at half time too would that have made a difference according to rules below.
In summary:
Each team will be permitted to use a maximum of five substitutes.
To reduce disruption to the match, each team will have a maximum of three opportunities to make substitutions during the game; substitutions may also be made at half-time.
If both teams make a substitution at the same time, this will count as one of the three opportunities for each team.
Unused substitutions and opportunities are carried forward into extra time.
Where competition rules allow an additional substitution in extra time, teams will each have one additional substitution opportunity; substitutions may also be made before the start of extra time and at half-time in extra time.