Yes you could, you get all the symptoms of a normal pregnancy.
That is perfectly normal.
Yes, you can. Many of the symptoms women experience from their period (sore breasts, cramping, even nausea) are similar to pregnancy syndroms. Don't worry, it's normal.
Absolutely yes. My first pregnancy symptoms were indistinguishable from my normal PMS symptoms: cramps, sore breasts, fatigue. In fact, it's why I never considered I might be pregnant until my period was over a week late. This lasted throughout the early pregnancy.
As with many of the pregnancy symptoms, it is quite possible to not experience them and still have a perfectly normal pregnancy. Many women do not notice a change in their breasts at all.
Nobody is "normal" and most pregnancy symptoms don't kick in until around week 9-11. You might not have sore breasts or fatigue, and some women never get morning sickness, lucky!
Heterogeneously dense breasts are normal. Heterogeneously dense breasts are not a condition described by symptoms.
No it's not normal, these symptoms are cause by pregnancy. Good luck!
yes, very normal
Yes - early pregnancy bleeding is often mistaken for period bleeding. If you don't have any other pregnancy symptoms (e.g. nausea, sensitive breasts) then you shouldn't worry. If you have got other symptoms then you might want to use a pregnancy test kit.