I went thourgh this from the age of 8 months old to 18 months.
He didn't sleep through the night yet
24/7 I was beyond exhaustion.
What I did:
I became creative and bold in getting me some help.
Sometimes my neighbor would watch him while I took a looooong bath.
I called all, and I mean, all myfriends, explained the situation and asked if they could watch him, in my house for a couple of hours. Or 30 minutes, anything!!!
I was right there, but my friend would watch him and play with him while I took a nap, paid my bills, took a nap, enjoy some wine and dark chocolate or took a nap.
I have no family close by so I used all the help I could.
I tried to find some local single moms to take turns but I was not sucessfull, maybe you can try that.
I did joined a local single parenting group. I would attend the events, that gave me some adult time and, if I got lucky, my little one would play with another adult other than me so I could actually sit for a few minutes.
Hope that helps..reach out and you might be surprised of how much help you cna get if you make it possible in your very very tired mind.
Sending you tons of love