Could I be pregnant?

Hi sorry to bother you all.. I'm after some advice, I had what they call an early period... Which wasn't very heavy and it only lasted 3 days.. But I've had slight cramping and my belly is sore to touch.. I struggle when sleeping as I always sleep on my side and I can't do that as I get pains.. I also get shooting pains in my boobs.. And I constantly feel sick and bloated.. I have been to my doctors and done a pregnancy test but there saying it could be too early to tell and if I still get them they will get me in for a scan but I'm really worried as I've misscarried in the past working out the dates If I am pregnant I could be anything from 30 days to 14 so I'm just unsure wether to wait until my next period is supposed to be due but I just need so advice