I have this stretching feeling.......?

on my bikini line area. I posted a question the other day with regards to the possibility of me being pregnant. I done a test and it was negative although I done it in the afternoon and I believe you are supposed to do it first thing in the morning. Anyway I still don't feel right and now today I have this kind of pulling sensation on my bikini line area, not so much of a pain, its quite weird. I spoke to my GP yesterday and he said its possible that I could be pregnant, so just before I spend a few more quid on another test, what do you think? Sensible answers please