It is possible to have neurofibromatosis 1 without neurofibromas. As you are already having under arm freckling and cafe au lait spots,chances of having NF 1 are high. It usually runs in family. Is there someone in your family afflicted with the disease? Also for NF 1 number of cafe au lait spots should be more than 6 in number and larger than 1.5 cm in size. Nevertheless, visit a dermatologist
, to get yourself evaluated. Take care.