My OTR microwave instructions were 30 min clearance between the bottom of the cabinet and the top of the cooktop. I have 32 total, so my microwave is about 16 over the gas cooktop. It passed the code inspections at that height.
There are some ways to get baby's attention, but if fetal movement isn't felt enough, call the doctor. The gentle rocking of mom's everyday movement most often lulls the baby to sleep, hence baby sleeps all day and wakes up when things get calm at night. To alert baby, simply lie down for an hour or two and chances are she'll wake up and move around. While you are reclining, change your position occasionally, between lying on your back to lying on your side, for example.
And don't worry if your baby's first progress is backward-that's common-because her control of her upper body is more developed than that of her lower body. She soon will learn to move in the other direction, too. To encourage your baby to crawl, give him plenty of space and let him loose to explore. If outdoors, make sure his knees are covered, even in summer (with lightweight fabric). If your home is basically clean, don't worry about his getting a bit dirty while down on all fours: A small amount of dust won't harm him.