It's really hard, I couldn't let her cry, she's my first baby and as soon as she cries i hold her, i know it's my fault as my husband said but i cant

I know it's hard but I've read that when you see signs of baby ready for sleep,set baby down in there and if she cries let her cry it out.

During the day she took a nap for 30 minutes but i have to keep her in my lap for 15 minutes

Try having your baby take naps in the crib first

mine was the same way, i had to put down a nice warm blanket under her and she used to fall asleep to drinking warm milk but now she just falls asleep with me and ill put her in bed gently.

I tried as soon as i put her in the crib she woke up crying like crazy... i tried to put a pillow under the mattress to make it higher, i tried to put cove under her, music, light nothing work