No, that speed bump won't cause a new concussion injury.
Did your symptoms worsen after the incident? If not, then don't worry and relax.

If it did, then there may be some underlying conditions that are triggering the flare up. It could be one of these 5 things:

1. Blood Flow
2. Inflammation and hormone dysregulation
3. Visual and/or vestibular dysfunction
4. Neck dysfunction
5. Psychological

So you have to check and treat all the possible causes.

A neck injury can be caused with a low G force event and the symptoms overlap with concussion symptoms so get your neck checked out.

Inflammation could be cause by a poor diet and a leaky gut, so eat an anti-inflammatory diet. Cut out sugar, processed foods, fried foods, and seed oils. Eat lots of healthy fats, fish, protein and veggies.

Exercise is good for blood flow and circulation, so keep up the bike riding. Just take it easy when you ride.