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
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.
Yes it is normal :)
Sore breasts may be an indication of hormonal changes such as ovulation, menstruation, or pregnancy. Sore breasts can also be an indication of breast growth, particularly if you're in your teens.
Some women are, some aren't. I was very sore with my first pregnancy and not at all in my second.