The suprasternal notch is the dip at the base of the neck. Feeling a pulse can indicate that there is a problem with the aorta which may need to be addressed, as this major blood vessel can lead to severe medical complications if it is compromised.
I would advice you to check with a Dr. or if your pain returns go to the Emergency Department or call 911. Please remember I am not a Dr. and any decision re this concern is yours to make. Do be your own best advocate and let us know what you find out.