mucus plug after cervical check

so I'm 35+4 days. I had my cervix checked yesterday. my cervix was at a 1 and still pretty thick, and posterior. after my appointment I had really bad cramping and back pain that lasted about 5 hours, then stopped, and just a bit ago i was peeing and i felt baby move, and it hurt. i mean i grunted. and i whipped and was checking for blood cause i felt agush when i had the pain from baby moving and (TMI) I had super stringy and clear discharge and a piece of it fell off the TP. and now my back hurts. lol is it normal to lose your mucus plug or pieces of it after having a cervix check. my MIL is trying to tell me I'll be going in to labor soon. and I keep telling her it regenerates if you dont go in to labor with in 2 days. shes telling me I'm having back labor.. I thought your family was suppoes to help you stay positive and calm. not freak out about preterm labor.