sorry to hear about it

i went thru that before and know what's it like. indeed IVF journey is both physically n emotionally exhausting and painful. Dont feel upset over it for too long as you arent alone. Many of us go thru that.
Be strong

You might want to go TCM to check on what's best for you. TCM like Eu Ren Sang is quite food. Food after MC will be just like confinement food to help you recover. That's what I take previously. Dont worry too much and stay focus on recovery for now. One at a time, if you keep worrying and trauma over what happen now... you will not recover well and wont do any good for the next transfer.
I have nothing to transfer previously after MC. So be happy! You have one more chance! and grading of embryo doesnt mean anything at all a successful pregnancy!