3 month old doesn't like cosleeper. One sleep deprived mumma needs advise!

I've been bed sharing with my 3 month old since birth and it was great. However, hubby doesn't like her in the bed and so the past couple of nights I've tried getting her to sleep in her co-sleeper bassinet thats attached to my bed. Its been horrible. She'll wake more often and the only way to get her to sleep is to make shushing noises and I'll use my hand to hold her hands to her chest and very gently rock her side to side. I have to do this for quite some time, if I stop too early she'll just wake up. I'm not getting much sleep and it's definitely taking a toll on my sanity! I need advise 😭