Bleeding on front hairline post FUE: Is this a sure sign of lost/damaged or dislodged grafts?

Bleeding five days after surgery is not considered "normal".  It would be best to contact your doctor for a follow up exam.

Shedding grafts is a normal process after a hair transplant. Sometime every hair and every graft sheds and does not return until the hair goes into anagen which is usually 5-6 months after a hair transplant is done

your doctor should have explained your post op care and its application. If you bled after few days, you may have dislodged some grafts when picking on them. There is not much you can do now if it is a dislodged  graft. You need to be more careful touching the recipient area for the first two weeks. If you have concerns, you need to talk to your doctor and do a follow up visit.