How would you describe your baby's movement if you have an anterior placenta?

Up until around 22 weeks I could feel definite kicks, mostly just higher up around my belly button.

Lately, all I feel are very light feelings lower down and only if I'm really still and concentrating on feeling it. So I don't feel anything during the day while I'm busy at work, only once I get home and lie on the bed do I feel the slightest bit of movements.

What i do feel however are areas of my belly getting tight and hard. Very localized areas. Is this caused by my uterus contracting or the baby pushing against me? It feels like these feelings are getting more frequent. I've had it all day today.

I'm really confused about what is going on and if it is normal??