What Causes Severe Pain In Lower Spine Having Neurofibromas?

i have nf1 i had mri about 2 years ago. for the last 12 weeks when lying down i have severe pain in my lower spine. when wakng up in the morning i find it vey hard to move and find my self almost having to roll out of bed. i also had some neurfibomas removed 3yrs ago and is growing back and is painful sholud i get this seen to