Honestly, back pain is super common when your period is missed. Try to lie down straight on a firm mattress and keep a small pillow under your knees. Take steam or use a hot water bag if it hurts too much, but don't take any random painkiller.
While it can be normal, back pain sometimes comes with other complications too. Better to call your gynac and get a blood test or scan done. Safety first always, so don't ignore it if the pain is severe.
It absolutely can be, but frankly, guessing won't help. Just buy a Prega News or any standard kit and test with your first morning urine tomorrow. If the pain gets really sharp though, you should speak to a doc.
In my case, back pain was actually my very first symptom before the positive test! Your body starts producing progesterone which loosens the joints. Rest as much as you can right now and drink warm milk.
Arey, don't stress yourself overthinking this. Yes, it can totally be an early pregnancy sign, but please do a home test first to be absolutely sure. Just rest today, don't lift anything heavy at all.
My back pain started right from the missed period stage and even after my C-section, I had to be very careful with my posture. If it is pregnancy, start sitting with proper back support from day one itself. It helps a lot in the long run.