Help with Mucus plug and discharge??

Tmi I know, but I lost the bloody mucus plug at about 7:20am this morning and when I wipe since I’ve had browny discharge, just wondering if it’s normal or not? (I’ve been having bad cramps on the left side of my lower stomach that were coming and going all morning, i threw up about 9:30am with the pain and I’ve been fine since) I’m 40+6 so I know it’s bound to happen sooner or later, i have a midwife appt tomorrow but was unsure whether it’s worth a call to my local birth centre or not! Tia xx