In regards to your question whether divorce is negative karma or not, that depends on your motivation.

It is just another action. Like eating, walking, sitting, or sleeping, whether the action is negative or positive depends on the motivation.

In regards to marriage, if divorce happens, let it happen.

Now is the time to fight. Now is the time to do battle, to go to war with the samsaric emotions. Samsara never brought any happiness, and now is the time to realize this.

My very dear one,I checked regarding your question. For purification read the Sutra of Golden Light 300 times. There are three versions—elaborate, medium and short. You can recite the short version, but also the middle and long one.

A student wrote to Rinpoche asking how to purify three abortions. Also, her husband had been killed and she had petitioned for the man who murdered her husband to be executed. She was also in a lot of physical pain. Rinpoche gave the following advice.

Several years ago, a student and her partner decided to have an abortion. After the abortion, she drank too much and cheated on her partner, but she deeply regretted these actions and had made a strong determination not to do them again. She had taken refuge and vows not to kill, cheat or steal, and had also recited about 20,000 Vajrasattva mantras and written out the Sanghata Sutra twice. The student asked Rinpoche if there was anything else she could do to purify these negative actions from her past.

According to my divinations, it comes out best for you to work for whichever guru you have a Dharma connection with. Hard work is best. You have to purify not only this negative karma, but also many other negative karmas.

If you are considering abortion, it is better to plan for adoption than abortion, unless the baby may be deformed or have terrible suffering. Even so, there is no comparison between that suffering and the suffering of a hell realm.

Rinpoche gave the following advice to a woman who wanted to perform purification practices after having had an abortion.