Can douching with lemon make ur period go up?

No . There is no scientific evidence to think that that would do anything. Lemon juice may be very irritating to the vagina as well. I would not do this.
No. Douching doesn't start your period. But it can irritate the vagina or cervix and cause bleeding. It also increases the chance for a vaginal bacterial infection, which is why we don't recommend douching. The vagina is self cleaning generally.