Maybe, but not necessarily ruined. It depends on the construction of the inner bag: a black, lined bag with a good double fold or sealed closure is often effectively light-tight, but not all packaging is equally protective.

The practical way to check is to develop one of the top sheets and inspect it for fogging or a light strike. Use the notch code to identify orientation if needed. If that sheet looks normal, the rest are probably fine. The emulsion side is generally more vulnerable than the back, and the top sheet would usually be most at risk.

If you see only slight edge fogging, it may not materially affect real photographs except possibly in deep shadows. But if this film is for important or irreplaceable work, the cautious choice is not to trust questionable sheets.

For future loading, practice with already exposed sheets in daylight and then in the changing bag until the process is automatic. That reduces the chance of this happening again.