DS has been in his new big boy's bed for about 4 weeks now and was initially fine. We put a mattress on the floor next to his bed in case he falls (didn't want to get a bed guard to start with). Now for about a week he has fallen from his bed at least once a night and managed to roll off the mattress to the wooden floor screaming blue murder. Should I persist and let him fall or get one of those bed guards. My pregnancy brain is not functioning properly...