There is no way to know if the ride did long term damage. The fact that you are concerned suggests you may be prone to anxiety. Anxious thoughts can prolong your recovery.

If you ask this questions of most doctors, most will hold it against you and likely label you as an anxious patient.

The take away from this is simple. Don't do that again until you are completely symptoms free for a month or more.

Another thought for you. Mountain bike rides are a very risky activity, even with a helmet. Bike helmets are better at protecting from skull fractures than concussions. They reduce impact forces but do not prevent concussions.