Yep, the first time my husband found it, years ago, first my knees started shaking, then orgasm, and then and I cried, but not on purpose! I had heard of a G-spot but I didn't know anything about one, so my husband filled me in on it shortly after we met (he used fingers, not words, lol!) I didn't cry except that time and maybe one or two others, but my knees still shake.
I'm really familiar with it now, but toys are never the same as him. Wow do I love those fingers.
Just try to relax as much as you can, and feel the emotions, and cry, shake, yell (into a towel or pillow if necessary?), whatever, just let it out! If you're like me, it won't continue to be that intense, emotionally anyway.
But of course, if the feelings start to feel negative, or like you're hurting, then stop. Whatever you do should be positive, not negative. There's no hurry, you don't need to be trying to reach any goal, and it's okay to not have a timeline. Just do what feels right and no more.
Also, I remember that after feeling those strong emotions, and crying, I felt like it was a really great bonding experience--the feelings, the orgasm, the cuddling as I cried. Very special.