Had Sedation Dentistry Before I Found Out I was Pregnant

We weren't actively TTC (no charts, ovulation tracking, etc) but we weren't preventing it either.  My dentist is a "Sleep Dentist" who specializes in patients who have sensitive teeth that require sedation for a regular cleaning, anxiety patients etc.  I took a pregnancy test the week before and the day before my scheduled cleaning/filling knowing that I was going to be sedated by IV with "twilight sedation" or a benzo.  They both came up negative so I proceded with my appointment (the dentist was aware of the negative tests).  

Flash forward 1 week, and I took another pregnancy test since I was feeling, well, pregnant, and still hadn't gotten AF (not a huge issue for me since I have irregular periods to begin with).  If I go by my last period I am probably 8 weeks, making my baby 7 weeks when the procedure and sedation was performed.  My appointment with my OB isn't until Sept. 4; and I can't figure out why I didn't get a positive unless I am off on how far along I am (let's err on the side of caution though and go with 8 weeks).  

When I made my appointment I told my OB about the benzo sedation, and she is thinking that if I didn't get a positive then I am not as far along as I could be in which case "there might not have been a fetal pole yet".  She left it at that and said we could talk more in depth at the appointment about my fears when we confirm my due date by u/s.  

I am terrified, benzos are a Class D drug, and if per chance I am 8 weeks, and was 7 when I got the benzo sedation, then there WOULD have been a fetal pole.

Anyone experience any issues with short-term one time benzo use and a pregnancy?  Can someone calm my fears or at least give me some information so I can approach my OB about a possible earlier appointment?

[findinghumility]

Do you know what benzo drug specifically was used?  I'm seeing mixed information online depending on what was used.  I mean you're right that it's not recommended, however much of what i"m reading talks about it crossing the placenta which you wouldn't have had yet.  The good news is that it was, as you say, "one time" use and you were so early on in your pregnancy.  I personally think that if you don't know you're pregnant and are so early on, that is a time that your body is very protective.  That if something did "go wrong" with development because of that drug use, you would have had an early miscarriage.  And if not your odds are good everything should be fine. That of course is not a scientific way of looking at it, but I think your odds are better that everything is ok vs there being a problem.  The good news is that you have an appointment with your OB coming up they should be able to do an early u/s and give you more info about what the actual risk factors are depending on how far along you are.  If you know the specific type of Benzo maybe we can find more info online as to those risk factors specifically.

Good luck though.  The not knowing is SOOO hard.  

[meeganreegan]

Out of curiosity, what did you find out at your OB appointment?  My SIL just found out this morning that she's pregnant (much wanted) after having had dental sedation a week ago, and she's totally freaking out.