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.
Your second pregnancy makes everything a bit different, that includes when you start to feel your baby move. Feeling your baby move for the first time in each pregnancy is called quickening. While a first-time mother might not feel her baby move until after 18-22 weeks, as an experienced mother, you may notice that you feel your baby much sooner. You might notice quickening in a second pregnancy only slightly sooner, for example around 16-18 weeks.