Female acting weird

She has been laying her head up on the side of her tub and today when i went to change her water she stayed extremely still we i touched her. She also looks super huge since i got her two weeks ago like thick wise. and she has been laying on the cool side of the tub most of the time. She is three years old and about 1900g.

You could have gotten her when she was being bred.

Sometimes my BPs sit with their head up but I'd check her mouth in case of an RI. Snakes will tilt their heads upwards to have the mucus drain from their noses and mouth.