Pain relief and what's safe

I'm a hairstylist and I did the worst thing ever today- I grabbed the curling iron by the wrong end. I have bubbling burns and swelling along my thumb and first two fingers. I have been icing it since that is the only thing that seems to ease the sting but I also took one Tylenol 500mg Extra Strength about 4 hours ago. Am I safe to take another before I head to bed in a few hours to knock me out or does anyone have experience with burn relief? I'm 15 weeks along. Thanks in advance!