Thanks soooooo much for all the responses girls, really appreciate it heaps!

Eng - Thanks sweetie - I'm seeing my GP tomorrow at 1pm now and not too worried anymore as my back has been much better since yesterday, so I'd say it's normal like most of you's said and that everything is just stretching and growing. Will definitely mention it to my GP tomorrow though. Oh and yes, I'll definitely see you for lunch on Thursday!