Not to sound repetitive, but....not to sound repetitive but,...Can you take anti-inflammatories like Ibuprofen?
I'm allergic to NSAIDs so it never even occurred to me to ask you about that! (Silly goose, me!) That would be a good idea, (if you are able).
One thing I've learned from my (cough-cough)---- "exciting" and "adventure-filled" life, resplendent with accidents, surgeries, injuries, and just plain goofing off sometimes,.....is that it's very, very common for the body to be asymptomatic for even the first 72 hours! (Wow!) Sometimes it takes a few days for things like bruises to even appear, for the soreness and stiffness to kick in.
I'm convinced (just my personal theory, I may add), that that is why "they" (read: mostly the insurance people) want those accident reports of ours so swiftly, and are keen to inquire about your (lack of?) injuries at the scene, at the moment. If they can get it in writing that you said you were feeling fine, it can become harder (or more challenging, at least) to file personal injury claims along the road.
I learned a lot of this information from a chiropractor, actually. He taught me quite a bit about the "politics" (?) or the "inner workings" (?) of insurance claims. He also taught me that sometimes it can be several days, a week, or even two, before things start to manifest.
Among the reasons for this, I learned: Keep a journal! And be faithful about writing everything in it that you're feeling, emotionally, physically, psychologically, anything-ly! That's what I did and I'll tell you this, I am extremely grateful that I did. If you rely on your memory, or if you rely on whatever the doctors happen to write down, you can miss a great deal.
It was such an eye opener for me to go back and read everything I had written, day by day, as I was going through it. Truth is: I would not have recalled it with such vividness. Keep a journal. It will not only help you feel better, but it's a wonderful tool should you need it in the future....especially after an accident.
Be well.
M.