they should have you lay on your side for a massage unless they have the special preggy lady fat belly massage table. But if it's a beauty place they probably will just do relaxation massage and not lymphatic drains, bowen, pressure points etc etc as those are more remedial and sports massage disciplines... so it should feel nice but probably won't do much if you have a sore back iykwim. You may wnat to check what products they plan to use as well.