OP, you are great. You sound like you're doing a great job. You're raising a child on your own, you're volunteering, you're studying.
Your DS doesn't sleep through the night, and you've just got over PND. Sure, you could do a dead end job with no possibility of career progression, come home at the end of the day, have to do bathtime and bedtime and dinner single handed, rush around cleaning the house with one ear cocked for the sound of him waking up, go to bed, be woken up several times throughout the night and go to work the next day and get exhausted, and gradually drift back into depression. How's that going to help you, him, or your future earning potential?
I'm a single mum of 2 (the youngest is only 2), and I'm busting my arse trying to get my business sufficiently profitable to comply with UC strictures on the self employed, having to drop everything at 2.30 to go and do kindergarten/ school pick up, deal with kids and housework, then when they're in bed do paperwork and admin (yes, yes, I know. Off to do it in a minute). And it is, definitely, adversely affecting my MH. And I don't have PND, my ex has the kids EOW, and there is a point to all this- future gain.
If I was in your situation, precisely, I'd do exactly what you are doing now.
And for all those whining about how they had to go back to work the minute they left the delivery suite, and how they're working for £00.1 an hour, a few things:
It's not a race to the bottom; enlightened government policies about decent maternity leave, affordable childcare and the CHOICE of whether to go back to work or not when you have a pre school aged child would benefit us all. Punching down isn't going to make your lives easier.
How many of you have to go back to work because you're paying a mortgage? Yes, it's no doubt tough, but at the end of it you have a house. I won't, and neither will OP.
I see so many threads on here asking people what they're doing in the evenings, and most are usually planning on lying on the sofa watching TV. I often think "How the fuck do they even get the time to do that? I'm always busy in the evenings!" on Mumsnet, no really, I'm going to do those invoices in a minute . Should I then start a thread about how it's not fair that people get to lie around watching TV, and they shouldn't get the opportunity to do this as a lifestyle choice because I have to work??
Jealousy is just so unappealing, especially when it's this misplaced
.