What to do I am lost?

Me M (28) broke up with my girlfriend F (26) 3 days ago after 3 year relationship. We broke up on mutual agreement because she said she doesn't have feelings for me anymore only attachment. I said I still got feelings for her but she still wanted to split ways. She hugged me and just said that she is sorry. Told me we can still be friends. I said I don't want that with the person I have still got feelings for.

When I came home I still couldn't believe what happened. I texted her maybe we missunderstood eachother and asked her maybe she would like to try again and she said that we already tried and texted me goodluck and goodbye.

I am writing this shaking and hurting like hell don't know what to do. Have many questions like:

Is she in pain like me?

Maybe there is another guy (told me no when we had the breakup talk)

I want her back but I know if I reach out to her so soon I will be needy. I have this thought that maybe if I don't write her for 30 days maybe she will write me. Yes this sounds desperate but I can't let go of her so fast.

Can't sleep even after hard nightshift I just worked. Any advice?

What to do I am lost?
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