First pregnancy... First trimester

This is my first pregnancy and I am 4w3d. Last night I was having some light cramping which I’ve been having so I wasn’t worried at all. When I went to bed, as soon as I laid down it got 1000x worse! It was like really bad period cramps, worse than any period cramps I’ve ever had though.. It was radiating around my back and down my butt/ thighs, as well as my lower abdomen. Is it normal (I know only doctors can tell me whats going on, I’m looking for opinion) to have cramping that bad? Today has resumed to normal, light intermittent cramping but what seems normal to me.