Looking for some reassurance...I've been here before but it's stressing me out more than ever.
Bit of back story...
4 years ago when pregnant with DS1 I developed really bad insomnia. It eventually went a few months post partum (I took a drowsy antihistamine once and it seemed to knock it on the head as it reassured me I could sleep well and my anxiety around sleep lifted).
Fast forward to now. I'm 6 months postpartum with DS2. He wakes frequently but is quick to settle with a BF or cuddle. We (happily) co-sleep. Up until now I've found it really easy to go back to sleep after he wakes (around 4/5 weeks post partum I had a rocky patch where my hormones were all over the place and I struggled but quickly relaxed and sleep returned). But over the last week I've increasingly been unable to get to sleep at the start of the night. Last night I was basically awake until 4am. It's really panicked me as I can't work out why all of a sudden this has happened. Ds2 was ill and teething so we had one really rough night which I think started the issue this time around. I've tried relaxation techniques/CBT strategies etc but I just lie there with my heart bursting out my chest and a sick feeling in the pit of my stomach. I can't take the drowsy antihistamine as co-sleeping and he feeds in the night so can't give him to DH because he won't settle for him.
Any reassurance? Ideas? Tips? I'm tiiiiired.