Yes as you rightly told you seemed to worrying much. Stress
can not increase the BP so much. Palpitation
is usually because of change in heart rate
During the attack of palpitation, try to take an ECG. Try to be relaxed and calm. Now that you are in a good job, try to be happy about that.
140 systolic at your age is normal, don't bother.
Continue same healthy diet.
All the best