Advice needed...

I fell asleep earlier for an hour, woke up with a headache still feeling tired but couldn’t sleep anymore. Started to feel a bit sick, and just drained. I wasn’t sure if it was baby moving or Braxton Hicks but my belly become hard, mostly towards the bottom, I can’t get comfortable feel a lot of pressure, feel like I have the urge to go to the toilet, but nothing happens sorry tmi. Just a lot of lower abdominal pain like there’s a band around it... I’m 27 weeks pregnant, I dunno whether I’m over reacting, first baby I don’t know what’s normal and what’s not!