Mucus in the stools is not related to pregnancy, it is related to irritability of the bowels either due to hormonal changes or infection. Fetal biophysical profile
done during an ultrasound
and fetal cardiotocography
to monitor the fetal heart rate
are two of the very good methods available to assess the fetal condition. You should be able to notice 10 movements in a period of two hours at this stage of pregnancy and if you cannot record as many even by lying in the left lateral position, you should consult your doctor immediately and take advice. Good luck.