BP: My top number is high, but my bottom number is low

I've noticed over the last few years that my top number is going up, although my bottom number is around 70.  Each doctor seems very unconcerned, and they always seem to blame it on stress.  Well once it was my physician and I had a bad cold, the next time it was at my dentist's, and today at a rather stressful checkup for something unrelated.  I always had around 115/70, but now it's been at around 125-130 and today it was 143 (although as I said, I was FILLED with anxiety at this visit...) The bottom number today was 73.  What should I, do I need to do next?!  

[Barbarella]

Anxiety can cause your top number to go up 50 points or more.  A top# of 143 while having anxiety is nothing to worry about that is why the doctor seems very unconcerned.

Get yourself a BP monitor and check your BP at home every day for about two weeks, make sure you are not having anxiety about something, are stressed out or in suspense because that will give you a false reading even at home.

Your bottom # is perfect.  

[VAT]

Thank you.  Today at work, still a little stressed, I checked it and my bottom was 66 and my top was 130.  I'm going to be stopping in on my mellower days and see what's up.  Also I haven't been getting on the treadmill and have gotten a little lazy eating wise, while i'm usually really careful, so I'll I'll see if that affects it over the course of this next month.  Thank you SO much!

[culp]

my top will be 155 to 170, but my bottom will be 65 yo 80.  What causes this?