hett I had a long labour, 38 hrs but I was induced, surely yours will be different. I had any drugs they had on offer and the spinal was the best.
I would ring the labour ward if it was me, there should be a number on your notes, just tell them you were involved in a minor car accident and see what they say, they might ask you to come in for a quick check of baby. Saying this, I do not think anything is wrong with your baby but think it's best to get checked or at least speak to them for reassurance
I had loads in my hospital bag! I would pack pyjamas, nighties, big knickers, pads (loads), toiletries, clothes, nappies and wipes for baby, some food and drink as well, you will be fed in the hospital but your OH won't. I also had my phone, charger, digital camera with extra batteries or charger, my feeding/body pillow, can't remember what else but I was not so organised with my hospital bag, I just packed it all at the last minute. I bought cheap nighties, track suit bottoms and knickers in asda which was really good as they all got ruined with all the bleeding after the birth so I just threw it all away as it was very cheap anyway. But yeah don't be surprised if your bag is more like a suitcase, it's normal!