Narco at 39 weeks??

I've had a migraine for 3+ days that has been affecting my vision.. I DID go to my doctor today! My blood pressure was low and no protein in my urine. The tylonal is just not even touching it. My doctor prescribed me Narco to take to hopefully knock this migraine out... I'm just scared to take it, but I'm absolutely MISERABLE! I also have a toddler that I care for while my husband works nights and sleeps days