Advice on braxton hicks

Hello

Can anyone give me a bit of advice please, this is my 2nd pregnancy but i cant remember much with my 1st.

Over the last few days ive been getting tighting's over the top of my bump maybe 1/2 inch above my belly button, it goes really hard and lasts maybe 30 seconds.

I dont know if thats what you call braxton hicks or if shes just sticking her bum in to my stomach?

I know Braxton hicks arent worrying and are normal but how do i know what they are?

They also make me feel like i need a no.2 but when i go to the toilet the tightness eases off and i dont need the toilet anymore..

As much advice is appreciated. Thankyou