I ran out of benadryl, so I took some dramamine... but there is a catch...?

I am out of benadryl. I take 100mg to help me get to sleep earlier, being a teenager I need my sleep. So I took a dramamine tablet I found in my bathroom, and after swallowing it I noticed it has been expired since 2006. It is 2011, so that makes it 5 years expired. PLEASE tell me if I need to contact poison control or not. I read that after a pill is sitting out for a long time, the chemical content can change. I am worried.