Cosleeping and my 3 week old!

So originally I had a bassinet by my bed side. The first 3 nights home i had her in bed with me because my anxiety was so high. The next few nights I would feed her and put her back in her bassinet and some feeds I was so tired I laid her next to me. Well, i think she knows what co sleeping is now because its not that easy to get her to sleep in her bassinet. My anxiety has gone down but she doesn't seem to be taking to her bassinet. I will feeding and change her, wait for her to fall asleep and when I transfer her to her bassinet carefully she wakes with 5-10 mins and starts rooting around for the boob. Sometimes I wait to see if she will fall asleep since I just fed her but 99% of the time she will start crying and I will pick her up and put her back on the breast where she will use my boob as a pacifier and fall back asleep next to me and we will literally repeat this cycle for 2 hours or so and eventually I give up because I need sleep.

The problem with cosleeping I am having is a wake up and my blanket is almost over her head 2 times and I panick so bad which she has been fine... but I know I need to bite this habit in the butt now! But I am pretty positive she knows what she likes, and she likes sleeping next to me and fall asleep with my boob in her mouth. I have tried 3 different brand nukes (she doesn't like them) and 8 have tried waiting until shes deep sleeping to move her..she wakes up 10 mins or so later..

please help. I don't get good sleep with her next to me, but it seems to be the only way she will sleep well through the night. I am just so afraid of SIDS