My almost 4 month old daughter (9th baby) is my hardest yet. She is very clingy, wants to use me as…

My almost 4 month old daughter (9th baby) is my hardest yet. She is very clingy, wants to use me as a binky waaaay too long. She used to take a binky now she won't. I need help. I have tried nuks, the one the hospital gave us jellypops? She used to like mam the best. But I NEED her to like a binky again. Or find her thumb (which I really don't want. Trying to get my 2 year old to give up her thumb.) She does chew on her fist but when she needs comfort it's not good enough. What else to try?