Two sacs?

So I went for my first appointment they wanted to out rule an ectopic pregnancy cuz I had been having this pain. Their ultra sound tech is out this week so they were going to send me to a hospital to get my sonogram done but it was gonna be a lot of money so the doctor did an unofficial one there. She rules out ectopic but told me she saw two sacs in my uterus. She wasn't able to do much but show me the two sacs. She was really surprised too but said that she wasn't for sure but there is a slight possibility I may be having twins. I'm going back next Thursday to get another sonogram done with the ultrasound tech. Until then I'm just freaking out, I never even thought about a possibility of twins. Has anyone else gone and had the same thing happen??