Taking Acetaminophen 11w

Meg
I'm 11w4d and I've been able to avoid medications so far, however I've had a killer migraine the past two days that's becoming unbearable. I sent my fiancé out to get acetaminophen (Tylenol) and he brought back the extra strength ones, because they didn't have the regular. One pill is 500mg, so would it be ok if I just take half of it?