Hi meganleewebb,
Sorry to hear you’re having trouble with your blog. While researching this, it looks like you may be using wordpress.com instead of wordpress.org. If you are on wordpress.com, you will want to check their support documentation and/or forums:
http://support.wordpress.com
Also, if you are on wordpress.com, you may be looking for this option:
http://support.wordpress.com/custom-design/
Please let me know if I misunderstood. If you are self-hosting WordPress, please let us know.
Thanks!