ouch!

Victoria
Hi, FTM here! So as of today I am 21w3d. I have an anterior placenta so I haven't been able to feel much up to this point aside from a few flutters here and there and ONLY in the low left side of my uterus (which I assume is where baby is!) Well the past few days it's like baby's kicks have multiplied in strength because I can see them from the outside so well and even towards the center of my belly. As much as I love to feel my nugget 💘 they happen so frequent that my abdomen is actually starting to feel sore from the kicks and flips 😣 just wondering if it is normal for things to progress so quickly? and is it abnormal for me to already feel tender/sore in the area that they kick?