Plan B or no?

I had unprotected sex with a guy last night. I’m not on birth control. He pulled out. I know, I know. I understand the risks. This was my first and last time ever doing that. (Worth it though. He was so cute and sweet and I’m getting over a heartbreaking breakup.)

Glow says my risk of pregnancy is at 3%. I’m not ovulating, since I finished my period a few days ago. I understand it’s unlikely he got me pregnant, but I’m not usually one to make big risks and I fear precum or a slip up neither one of us realized.

My question is... What are your thoughts on taking plan b vs. not? I’m fearful of the harsh side effects and these are my last couple days in town so I don’t have time to be throwing up or throw my hormones all out of line. I don’t know whether I really should take it or not and I only have so much time.

Thanks in advance!