They were indeed contractions. I went into the hospital last night and they gave me a shot to stop them. Thankfully. Bun needs to stay in the oven for a few more weeks!
It could very well be contractions, and to me sounds like they are. Based on your symptoms, you could have a UTI which can cause contractions. It can also be from dehydration - are you drinking enough? Do they change with position? (IE does walking make them worse/better) Being as you're 34 weeks and having them 15 minutes apart, it wouldn't hurt to get looked at sooner to make sure it isn't early labour.