Can i legally just go pick up my baby from an adoptive couple?

Hello. I made the biggest mistake ever by giving my baby up to an adoptive couple. Well this is how it went..my mom(whom i still live with)found a really nice couple to adopt my baby,which i was considering at the time,because i did feel pressured into it. They are real nice people,and we have become friends. When i had my baby a few weeks ago,i stayed in the hospital for 2 days with him which i loved. After i got home and they took my baby,i was so upset. I really miss him,and i really want him back. I'm in a terrible situation,but i know i can change my mind and i have..i just need to know if i can legally just go pick him up from them? I have not finalized or signed anything. I live in Michigan and I'm not sure how long i have to change my mind,but i heard it was 6 months but i am not sure. I'm also considering bringing my grandma with me so I'm not alone. The adoptive couple hired a lawyer and it's private adoption..and i believe right now it's called Legal Risk Placement,because i haven't signed anything and can change my mind. Well i look forward to reading everyone's answers..Thank You!