Backache gradually getting worse?

Is this something or nothing? I literally have no idea. Woke up at 5am with backache, it was dull. But throughout the day (It is now 4.37pm) it's got worse. The bottom of my back is aching and now the top of my thighs are aching. I was induced with my first so I don't know what "natural" feels like and any build ups. When I went into pre term labour last week and pre term with my first baby they where contractions straight away so I knew. But all of this is new and I never experienced this kind of pain at this stage (34+5) with my first. Just so sore and not really sure if it's early labour creeping again or not? Don't want to be like "Oh shit this is definately it" at the last minute or something? - I know I'll be told to call L&D; or something, but I feel other women's experiences may help me decide whether or not I do need to give them a quick call or whether I'm literally being a "mind over matter" diva right now!