Hello! Glad your scan went well and congrats that you are now sure you are having a little girl!!
Blood pressure could be due to stress, I know mine had dropped quite dramatically on saturday and was told then it could be because of stress. I was told to keep eating little and often and watch out for dizzy spells.
I didnt realise we had to have blood taken more than once either! I hate needles, it took them nearly an hour to get blood out of me the first time!

To be fair though it wasnt half as bad as I thought!
Anyway, best of luck for your 4d scan, im so jealous, really want one of those!!! Let us know how it goes
xxx