Shadowing is good but does that count as clinical experience? When I shadowed I was allowed to take blood pressure, hear the chest, talk to patients, etc so hopefully that covers me. The hospital wouldn't let me do anything besides answer phones.
Do something you're passionate about and not just to get into med school. Do you like talking to people? Then volunteer at a nursing home and keep the elderly company. Do you like to use your hands? Habitat is good for that. Like doing electronics things? I'm sure some organizations would like a volunteer to deal with computers or maybe build a website.