Hello, As the pain has started suddenly and after you got up . It may be due some muscle spasm as u might have slept with bad posture.please take heat pack for 20 mins thrice in a day  . If yet the pain does not reduce visit a physiotherapist who can assess you and give some exercise , stretches or modalities to reduce pain Plus being a engineer you might be spending lot of time in front of computer this causes neck or back issues .you may learn correct ergonomics from a physio and exercises which you can do only daily basis .