Oddly enough... I had a pelvic X-ray with my son about a week after conception... and with these babies I had a pelvic CT scan (which is worse) at 6dpo (I had OHSS and was in the hospital and the lunatic doctor was sure I had appendicitis)
My son is fine and I have no reason to think these babies won't be.
With my son I had a couple beers and some nyquil (not together) before knowing I was preg. Again, he's fine.
With these babies, I have IV morphine for 2 days and then went home with Vicodin which I was told is OK when pregnant.
I wouldn't worry if I were you, not about those things. Habitual or heavy use may be a problem, but not what you are talking about.
From what I understand, X-rays are more "unknown" than harmful. Diagnostic x-rays are not all that high a level of radiation. It's radiation therapy you REALLY have to worry about. It's good if you can avoid the x-rays, but it's one of those cases where if the benefits outweigh the risks, do it. And it's not like people normally do x-rays recreationally.

(Although I understand you used to be able to look at x-rays of your feet in shoe stores to see how the shoes fit... which was probably pretty fun!)