Tightening/Braxton Hicks

Currently 20 weeks pregnant. I keep having this tightening feeling in my belly or what is called braxton hicks a few times a day. Comes a few secs then goes away. Baby is moving well inside. It's not painful but an uncomfortable feeling. Not sure if this is normal or not? I Googled and apparently it's normal since this is not my first pregnancy. Of course, I have never felt this before with my other pregnancies unless I'm in the 3rd trimester and nearing to labour. Anyone feel this currently or have felt this many times in a day before?