I also have a bicornate uterus. I thought that it was just me, i also have bad mood swings occasionally. I am also 27.
I'm off tommorrow to have the "laparoscopic excision of redundant uterine horn" procedure. Providing all goes well my problems will be fixed by this.
My suggestion standford is go and see a female specialist (gynaecologist) (as i had problems with a male one)and they will probably be able to sort this stuff out for you.
Hope all goes well for you.