Look At Your Partner(s)!!!!!!

[CecilOne]

Right, as trail your partner should definitely be checking you on an apparent goal. Looks like you did your part to get their attention.
I would have shouted "NO GOAL, NO GOAL, NO GOAL" repeatedly then blown the whistle repeatedly with multiple wave-off signals and hopefully get the keeper to hold the ball. The problem is the whistle is blown for goals, the offside signal is not useful until we get everyone's attention and the IFK signal is similar to the clock stop signal.
Presumably, the timer or your partner stopped the clock on the apparent goal, so at least no playing time was lost.