Still neg and no af. Read me give advice pls

Jerz
Haveing headaches here and there slight back pain..and cramping on right side of stomach. .2 neg dollar tree test..no period..no spotting no bleeding at all...obgyn sent me for blood work but also did vag.exam and said she didn't feel anything.. ( but it might be early) think she was just trying to make me feel better..im about 99% sure I'm not pregant. Had weight surgery in june down 70 pounds but never missed a af..ever in my life and once the blood work comes Monday and says neg. She will do ultra sound for cramps and see why...has anyone else experience this and not been pregant..I've never been so I have no idea how it would feel..no sore breast no sickness...ugh just scared now.. im 40 years old was 225 now 158 in 5 months. .ugh