Postpartum insomnia

I'm really struggling with postpartum insomnia. It's 3:30 and I've been awake since 2 and I doubt I'll sleep more tonight. Same thing happened last night, just three hours sleep. I've had this pretty regularly for almost two months. I tend to wake up and feel very alert and often have anxious thoughts. Anyone else have tips on how to get through this?

It doesn't help that baby is almost 6 months old, just cut two teeth and is feeding every 1-2 hours in the day and every 2 hours at night. They're full feeds and she's EBF so that's also just completely exhausting me.

The lack of sleep is really starting to mess with my mind and body. I feel like every joint is inflamed, I feel like I'm 100 years old. Husband is sick of hearing me complain, but I'm so frustrated with myself.