Am I being selfish now? Should I be doing it?

[TulipVictory]

Generally prior to this, I have never had this issue. I have always had a fairly high sex drive. On average me & my partner would still be at it 3-4 times a week even after children. However, since my third child who is now coming up for 6 months of age, I am struggling. I am breastfeeding too which I didn't for so long after the others. I feel like my vagina has fallen off, there is nothing going on down there whatsoever. I have no sex drive at all, not interested in sex, not pleasured myself. We have had sex twice and my partner I feel is starting to mention the lack of sex thing more & more now. I am consciously trying to tell myself to do it once we get to bed but to be honest once we get there and my head hits that pillow I'm so shattered that I just don't want to and I fall straight to sleep. The children and this baby who is very demanding especially takes up all of my day. This little one also wakes up in the night still too so what sleep I do get I feel like I don't want to throw away having sex 😏
What can I do? Are we ever going to get back to normal ? I'm starting to feel a bit bad now and I do miss the intimacy

You should never have sex if you don't want to and your partner needs to understand how tired you are especially if he is also not getting up in the night.

Is it just the tiredness or do you need a break from being touched as well? Having young children usually means there is barely a time when someone is not touching you.

If you do want sex could you have sex once the children are in bed and then either continue your evening or stay in bed? What about sex on the sofa when the kids are in bed?
Waiting until bedtime for sex rarely works with young children.

Breastfeeding completely suppresses a LOT of women's sex drives. It makes sense, from an evolutionary perspective. Don't underestimate the powerful cocktail of hormones required to keep producing milk for an ever-growing infant.

Also, having three children is exhausting and it's no wonder you are prioritising sleep, especially with night feeds still happening. Be gentle with yourself; this will pass.