Can you tell which side baby is on?

With our first IUI that took I could tell it was on my left side. Unfortunately that ended in miscarriage about 6 weeks. This time I am going to be 5 weeks tomorrow and my Dr says my numbers are great. We go for our first ultrasound on the 8th and I keep getting mixed feelings on which side its on this time. Most of the time I can feel everything on my left again, but lots of other times I feel things on my right side. Has anyone else ever felt things on both sides before?