Aww Toon, what a palava!!
Its so frustrating, I had a similar experience with Grace, at 34 weeks I started having contractions went into hospital just monitored me for a couple of hours, gave me paracetamol and mentioned that if it continued that they would have to give steroids to mature baby's lungs - I decided to go home as I was coping ok with the pain just wanted to know that my baby was ok. Contractions lasted about 2 days and nights (every 5 - 10 minutes) and then they just stopped thankfully. The labour ward were convinced I would be back in that evening but luckily that didn't happen.
The doctor said he thought I had eaten something which hadn't agreed with me which had then irritated my uterus causing it to contract.
Fingers crossed Lucas stays put for a little while longer x x x