Lower right side back pains heading towards the front pelvic area

Juliet

Currently at 15 wks 5 days pregnant. Doctor told me to rest today and take tylenol for the pain. The pain comes and goes but right now on a scale from 1 to 10 its sitting around a 6. No cramping or bleeding, but say doctor checks and everything is fine with baby should I still consider staying home from work for awhile to stay off my feet? And do you folks think she will be able to guess gender by now.