I don't think the bump is causing your headache and dizziness. The impact force from such a hit would be no more than the impact your head feels from stepping off a step or walking down stairs. But, these events can cause strong anxiety reactions. Anxiety reactions can cause symptoms that last a few days or even longer. A disruption to your sleep can also cause a similar reaction. Combine the two and you have a double whammy.

As an aside, I think you are pushing too hard by exercising at 90 to 95% so soon after strong concussion symptoms. A common standard is to slowly increase effort in 2 week steps if those two weeks are completely symptoms free. The recommendation is to not even start strenuous exercise until 6 weeks after a strongly symptomatic concussion.

Jogging and lifting need to be carefully considered. Lifting can cause neck straining that effects blood flow/pressure to the brain. Jogging can rough from the pounding action of a normal gait. Learning to run with a soft foot plant will help. Try jogging with foam ear plugs and you will notice home much your foot plant travels up you body. Then, you can modify your gait to soften the impact.

For many, symptoms can arise the day after exercise.