I went on a trip recently and was lifting heavy bags. a day into the trip i noticed a bump on my collarbone/shoulder area and slight pain in area and numbness/tingling in my hand and arm. 3 weeks later and still have bump and numbness/tingling?

You should be examined by an orthopedist because a simple cervical plexus strain couldn't fully explain all symptoms.

This needs a direct and thorough exam and likely imaging. Suspect a shoulder injury, but perhaps this also involves a brachial plexus stretch injury. Thoracic outlet syndrome might explain some of this. As advised, would start with an orthopedic surgical consultation.