Should I worry?

Cass • Expecting baby #1 🎀

So the past few days I’ve been having what I think are Braxton Hicks (21 weeks) but I’m having a hard time telling the diff between them and just the baby balling up and pushing out. I feel like if all this I’m feeling is Braxton Hicks then I need to be concerned. I’ll sometimes feel my very lowest tummy get super tight and go back to normal which I assume is BH but sometimes I also feel like a rolling feeling and then see and feel a hard ball or lump and then back to normal (is that normal and baby moving or is that also BH?)

Also my tummy seems so much firmer when I’m up walking or standing. Normal or having BH