Hi OP. It sounds like you had a much better night in the end.
After the first few nights of no sleep with DD, one night she woke up after about 25 minutes for about the 10th time that night and I took her to the chair to feed her. I fell asleep holding her. It was only for a few minutes but the idea that I might have dropped her scared the living shit out of me. We coslept after that.
With DS I slow laboured for two days waking with contractions that were between 10 and 25 minutes apart, then full blown labour on the third night giving birth in the early hours.
We got home late afternoon so no time for any rest. I brought him in the bed "Just for the one night". 5 months later his baby bed has never been slept in. Bollocks to it 
You do what you have to do. The Safe Sleep Seven are everything you need to know. You can find it with a quick Google.
Although his latch has been checked no one will be able to say for sure as well as a lactation consultant can.
I don't know about the pink urine but that aside, his output sounds perfect.
If you are going to top up with formula but want to continue breastfeeding there are things you need to be aware of, such as a risk to your milk supply. Your breasts will only make what he asks for, so say you top up an ounce after every feed - your body will start decreasing your supply by an ounce each feed.
It is very possible to do but it's worth doing your research on combi feeding.
Also beware the risk that teats such as those on dummies and bottles can confuse a baby when it come to breastfeeding. Advice is generally not to introduce either before 6 weeks.
Many mums use teats alongside breastfeeding without incident, but many others find it a problem.
You seem s lot happier from your posts today though, and I'm so glad you got a bit of sleep. It makes the world seem like a different place with a few hours kip!