Thank you for your query
is definitely one of the reasons for uneasiness in chest.Since you haven't mentioned any other symptoms like lack of sleep , or less appetite i think you shouldn't really be bothered about it.
But since you have mentioned that you felt a chest pain
it is recommended to definitely take an appointment with a cardiologist to check if everything else is alright.
If yes, then I feel you are absolutely healthy and fine. The sudden rise in bp and the uneasiness after the rollercoaster ride is very natural and obvious It potentially triggers high pulse rate.
Try to stay calm in any kind of stressful situation.This will be helpful to you all the time.
Hope this helps you.