I'm pregnant with my second child, and 13 weeks in I get my first ever hemmorhoid

I never had anything with my first!
(Warning: the following contains TMI!)
Anyway, went to the Dr, who said eat more fibre, etc etc, but that isn't really the problem. I have had the runs since becoming pregnant and anything with any sort of "solidity" to it, seems to cause them. I am not straining at all.
I was just getting rid of one, went yesterday and now there are more
Apart from the whole fibre thing, is there anything else I can try? I don't want to have this the whole pregnancy or during birth!