Makena shot headaches

I’ve had 2 shots so far, I’m 20 weeks and 1 day- last week after my shot I was fine all day, but the next day i had a super bad headache and diarrhea all day. I felt terrible. Since then I have been fine. Today I was supposed to get my shot but I am going tomorrow instead because my husband is out of town tonight and I don’t wanna be miserable without him here (I have an almost 2 year old). Anyways- I have a bad headache, almost like withdrawal I feel like my body needs the shot again. Anyone else ever have my symptoms?