Acupuncture during pregnancy

Does anyone get acupuncture during pregnancy? I've been getting it and I'm now 13 wks pregnant and every time the session starts and during it I start feeling pressure in my uterus area. Not bad hurting, pressure just a feeling of pressure there. I asked the acupuncturist and she said it's probably the energy going there. She knows I'm pregnant and we're doing healthy pregnancy treatment. Has anyone else experienced this or know why I feel it?