Can the embryo have problems if you have fluoroscopy for lumbar injection on day 23 of your cycle. hcg was neg, then 1 week after procedure it was pos?

Should be all orNone: Fetal X Ray exposure early in the first trimester is currently thought of as an "all or none" phenomenon. That is, since vital organs are just being formed, a mutation would likely kill the fetus if it did anything. X rays later in pregnancy may cause deformities which may carry into live births. Thankfully, most Fluoro procedures (incl.facet inj.) have quite limited dose, anyway. Not to worry.