To answer your first question first, perhaps the majority of the spells on this site will not work. And if you are not already trained and practiced in spellwork it is unlikely that any spells you cast are going to work.
It isn't necessary to get a spell from a spellbook to make it work. All spells were created by someone at some time. Many of us who have been doing this for some time always make up our own spells. Such spells can be better than ones found in a book or on the net because they are specific to you and your situation.
No spell is going to completely stop your periods from happening or even modify them a bit. Magic does not work that way. Magic is no going to alter your DNA and your DNA states that, as a woman, you are going to have a period.
As all of the others have said, this is something you should be discussing with your physician. A hysterectomy seems like a rather drastic option in this case and many physicians are reluctant to do that procedure if the individual is young, unmarried, and has no children of their own. But perhaps you need to discuss at length with your doctor as to why menstrual blood is so abhorrent to you.