scan today , finally

I'm 14+3 today and finally having my first scan. I'm a little bit scared that there's going to be something wrong, I seem to have got it into my head that there will be no heartbeat or no baby at all. I had an internal scan at 5 weeks as they thought I might have an ectopic pregnancy but it wasn't. however the doctor did scare me saying he thought there were 2 sacs :-\ another thing I keep worrying about. gosh I'm a bit of a nervous wreck today and its totally unlike me eeek!