Hello, sorry to hear your troubles and that you already had PND and emotional difficulty with your first. If you've had PND before and are struggling now,I would advise you get some targetted support ASAP for yourself.
It sounds like there's two things going on: the pain, and the frequency of feeding.
For the first problem, even if uncomfortable feeding can be common, if your latch is still painful then you may be able to be improve a bit- trying different positioning can be a really big help, as well as your technique in getting in deep enough into their soft palate. I'd try changing posture so you are leaning well back to feed, and the baby is coming down slightly onto your boob, not being held straight onto it- they can get a bit deeper that way. And other postures too, whether rugby or lying down.
Regarding the frequency, two weeks old is extremely tiny and very frequent desire to nurse is totally normal, even for hours. They're right in the middle of learning how to be in the world, having growth spurts, and building up your milk supply as well as refining how they feed. They can just want to be sucking away, it's fine to offer three, four, five sides per feed. If you supplement, you will send signals to your breasts that they don;t need to make so much, and now is the time when he obviously wants it. You are very likely to be able to make enough milk for his needs, and your boobs can't run dry- just switch sides again.
But it's more than that: please don't think that the baby only needs you for food. Being close and having cuddles while BF is absolutely just as important. They want to be near your skin because they arrive bursting with desire and need to be with you, they love you already.
T
he pressure of the need to support a baby is immense and frightening when it doesn't go easily, and even just during tough times like this. You'll still be having birth hormones in you which makes everything feel even more intense, combined with the lack of sleep, and worry about DH returning to work.
Can you try having baby near you all the time by using a sling, you can still get stuff done, but he can have more cuddles and might not want to nurse as much if he's already in arms. You can learn to pop them back into the sling once they've dropped off to sleep.
And ask partner to help as much as possible to allow you much more sleep. For example, you should be able to get way more than 4 hours sleep per night even if it's very broken- go to bed very early, like 7-8 pm a few times a week, and ask partner to use the sling too while you're asleep, giving baby skin to skin cuddles, so you can sleep as much as possible. Same at weekends.
Good luck and do find out someone to talk to ASAP.