Flying and early pregnancy!!
I flew around 7/8 weeks and just refused to go through anything, saying I was pregnant. A few of the women who had to pat me down had little comments like, wow, you can't be that far along...blah, blah. I just smiled and said we found out right away because we were trying and are really excited. Anyway, I also printed out something from the TSA website that says that anyone has the right to request a pat down for any reason, so you don't need a dr note. I never had to whip that out, though, but I kept it in my back pocket, just in case. Actually the hardest time I had was flying out of Miami later in my pregnancy, when they were short staff and had me and a bunch of others who needed pat downs for various reasons waiting for quite a while. Since it was my request, they kept asking why don't you just go through, it's just a metal detector, nothing will happen. And I said because it is my right to refuse and I won't discuss it further.
Apparently the radiation from the flight is higher than any of the scanning machines, but I just wanted to control things to the extent that I could.
I flew at about 6 weeks too and like Andaluza just requested the pat down because I was pregnant. The lady acted like she could care less and I had shared too much information. Anyone has the right to refuse, but they tend to think you are just a paranoid conspiracy theorist for avoiding. I say so what- I don't want to be x-rayed. I might just make it policy to refuse, pregnant or not.