Pale appearance can indicate low iron levels which its probably a good thing to get checked routinely anyway.

I wouldnt stress about it too much though, particularly if you feel good.

100/60 is normal BP. Readings like 90/50 are getting to be too low, this is when they will tell you not to stand up to quickly from sitting or laying down or to let them know if you are getting dizzy etc. Your bp lowers normally when you are pregnant