It sounds like round ligament pain. It's normal to have that as the uterus grows and stretches. Like you mentioned, it does go away and it's usually not too severe. As for your baby's movement, it's possible to feel some flutters! I first felt flutters at 18 weeks. It was like something bubbling. It'll get more obvious as your baby grows :)
It could be baby movement! Different people feel it at different times but 17 weeks should be possible. I believe I felt something at around 14-15 weeks but very subtle. A few more weeks it will feel more obvious then you will know for sure.
Baby movements doesn’t hurt. You’ll feel like gas popping and then flutters. First pregnancies can’t be felt within 16-25weeks or later, depending on your body. Listen to your gynae.