28weeks pregnant and cramping

28weeks and 3days pregnant and experiencing alot of pressure and cramping !!!

So last night around 8pm I started getting tightening in my stomach but also like a cramp type feeling and it kept coming and going every 6-10minutes for around a hour then stopped. At around 1am started again and lasted all night on and of but nothing so far today!!!??? Also for the Past week I have had really bad pressure down below . Any advice on what This could be,

This is my first so I do not know what contractions feel like / Braxton hicks or things what happen which are very normal and suppose to happen please help