My partner is 22 years old she never took birth control never been pregnant and she have two month straight non stop going for the third month
On her period? Or what you mean non stop?
Maria, if you mean she has been bleeding all that time, then something isn't right and she needs to go and see a doctor as soon as possible.
I would suggest seeing a GP or 111 or if still no luck a&e as a last resort as this doesn't sound right!