2 hours to fall asleep !

March🕉
Hey ladies 
So my 2.5 month old is taking almost 2 hours to fall asleep. She nurses pretty quickly on both sides within 30 min and get pretty drowsy. She wakes herself up though when I put her in her crib and then I try everything besides feeding her again to help her sleep such as rocking, white noise machine, patting her. 
Only thing I see for sleep training is pretty much letting her cry. Isnt she too young for that ? 
She normally falls asleep between 1030-1130 and doesn't wake till 7am. I'm just trying get her to sleep by 7-8pm but turns out to be the same with this process
Help 😐