Anyone have any adice to Adding formula to breastfed diet

I posted about this in another forum recently but My son is 11 days old today & he’s been nursing/using me as a pacifier since about day 4 or 5. Everyone told me he was cluster feeding to wait it out, but nothing has changed. He doesn’t like actual pacifiers.. i try to self sooth him.. rock him, use sound machine, nothing will make him stop crying until he’s latched back onto me. I breastfed my oldest & it was nothing like this. I’m considering to add formula, just for a few weeks maybe 1 or 2 bottles a day because I need some relief. My husband went back to work yesterday & I couldn’t even get enough time to prepare my daughters meals or help her get ready without my son going crazy. It makes me sad but I don’t know what else I could do. I wanted nothing more than to exclusively breastfeed since I didn’t get to with my middle child. So I do still want to breastfeed as much as I can, I just need at least a 2 hour break to do house work & work on stuff with my daughter. Any advice? Thanks In advance.