Not sure of your situation, but I had an ectopic preg. Had to have surgery to remove, and my right tube along with it
My doctor told me we could start TTC after my first period following surgery. So, we waited about a month. My period came back right on schedule despite the surgery.
I also read 3 months, but since my doctor said I didn't have to, we didn't.
We are currently TTC (I should be ovulating anytime now).
Good Luck.