Can contractions be painless?

Ma
I've been feeling my stomach getting real tight but it doesn't hurt or feel crampy, only sometimes it's felt a little crampy. Just noticeably painful, nothing too intense at all. Just feels like when period cramps finally start to calm down after the first or second day. So I can't tell if it's just baby stretching out my stomach or if it's a contraction. 
I'm almost 38 weeks. No signs of labor other than this.. I think I'm trying to make myself excited 😩☹️ 
I know I'm not going into labor or anything though.