Blood in my stool

I have had constipation in the past during my pregnancy, but I thought it had gone away, but now I feel like it could be coming back again, as I noticed a fair bit of blood when I wiped and in my stool yesterday, so I am quite alarmed by this. I have seen the doctor previously when I had constipation and of course there isn’t much you can take for it during pregnancy, so all they said was to eat a lot of fibre, but that never seemed to work. Should I be alarmed by the amount of blood and the struggle of going to the loo? And should I go got the doctors about this? Cause I think I should, but I thought I would see what other people’s opinions was and if anyone had experienced the same during their pregnancy before.