yes, very normal
Yes you could, you get all the symptoms of a normal pregnancy.
If the period wasn't normal yes. Because your period was normal, your not pregnant.
Sore breasts before period is normal. If you miss your period, take a test
You will get sore boobs at your early stages of pregnancy.
No. Just because your breasts are sore doesn't mean that you are pregnant. When you get your period, your breasts tend to get sore too. Sore breasts aren't the only sign of pregnancy.
It is normal not to feel any symptoms, I started feeling pregnancy symptoms when I was 6 weeks!
Yes this could be pregnancy related. Perform a HPT.
For some women that is normal. And some never get sore breasts. It depends on the pregnancy and the women. If you are worried, talk to your doctor, but that is normal. The tenderness may come back also.