Root canal :( help!!!!

Nothing like an emergency root canal at 24 wks. This pain is god awful! I think I'm in more pain today then I was before they started the work. A little nervous about the amount of Novocain they had to give me. I couldn't get numb at all and I think he stuck me like 12 times or more with two diff types of meds. Anyone else go through this esp while pregnant?! Any relief they have found? I've been trying to take very little Tylenol and alternating heat and ice.