Is anyone else having hemorrhoid bleeding?

I'm 18 weeks pp and whenever I don't have regular bowel movements, I end up bleeding. I know constipation can irritate hemorrhoids, but it freaks me out every time I see a red bowl! Is anyone else having this problem? Did your doctor give you any advice? How much bleeding is considered normal? It seems like so much blood to me, but I know hemorrhoids can bleed quite a bit. Every since I had my gallbladder out at 7 weeks pp, I've been kind of a hypochondriac so every time it happens, I convince myself I've got colon cancer or I'm dying or something lol. Putting on anonymous because I'm honestly embarassed.