At 8 Weeks Pregnant I Was Told I Would Miscarry

At 8 weeks pregnant I was told I would miscarry as there was no heartbeat or fetal development since last ultrasound. Tried to naturally pass the pregnancy and eventually was prescribed 4 misoprostol tabs vaginally by my ob. It's been 28 hours and I've have mild cramping, mild bleeding with only passing small clots and no tissues. Chills and headache. Can I take Excedrin Migraine?