As you are having severe pain
during your periods as well as on other days, one possibility is uterine infection
If you have pv -discharge, fever; it is more suggestive of uterine infection like endometritis
which will need antibiotics to clear.
You need to see doctor to check exact cause for same.
With Bicornuate uterus
you can still have second baby naturally if baby implant in proper cornu of uterus.
This is not to scare you, but chances of preterm labour and second trimester miscarriages are high.
So you need to take extra care during pregnancy.