When I travel I visit family but mainly go there to relax, shop, eat, and walk. Should I just put tourism and visit family/friends? or family/friends is sufficient?
You should list both of them.
What’s the procedure if I took a trip after my BI is done and submitted but before I’ve been given a decision?
Do I need to call my investigator or recruiter and let them know?
No need to call investigator. They will catch up on your reinvestigation. If you are already working at a cleared position, there may be some reporting requirement for foreign travel. If that is the case, check with your FSO.