Yes, it is totally normal. I actually panicked in my first trimester when my breasts suddenly felt so huge and painful to even touch. But my doctor reassured me it's just hormones preparing for breastfeeding, so don't worry at all.
Yes, breast changes are one of the earliest signs because of pregnancy hormones. Since I have PCOS, my body responded a bit slowly but I still noticed a clear difference in size and sensitivity by month three. Just wear supportive, wire-free bras to stay comfortable.
Yaar, actually they grow almost a size or two bigger! I had to buy new sports bras in my second month itself because the regular ones were suffocating me. It's super common so don't worry about it.
They definitely do get bigger and feel quite tender. Your body is beautifully preparing to feed your little one, so those milk ducts are expanding. I highly recommend shifting to soft cotton, non-wired maternity bras early on to ease the soreness.
Oh absolutely, they grow like crazy! I am in my third trimester now and none of my old bras fit me anymore, feel like a balloon honestly. Get ready to invest in some super comfy nursing bras very soon!