Bleeding from butt? (Pregnant)

Hi, so I’m 18 weeks pregnant I’ve felt fine I’ve had no issues. Until today, it was my first day at work and I went to go pee and found blood in the toilet. I wiped and it seemed to not come from my vagina but from my butt?

Is this normal? Should I be concerned?

I told myself I wouldn’t freak out that it’s probably normal cause of constipation or hemorrhoids?

Please let me know if you experienced this or not.

(The blood only comes out when I try to poop, I have nothing on my underwear and I forgot to take a picture)