Veronica,

I too had the same thoughts and still have them at times, particularly when bubs has gone quiet. Like the gals said, it is completely normal to feel this way and the further along you get in your pg, the less risk it is that you will lose bubs. Speak to your obs about how you feel and he/she will put your mind at ease (well mine did anyway). Make sure you take a tape with you to record this scan, as you probably won't have another one during the pg.