Low blood pressure and high heart rate?

[s54]

What are the possible reasons for having low blood pressure (varies from 93/58 to 105/68) with a high heart rate (at rest it varies from 95 to 120 bpm) My blood pressure also drops even more when I stand up from lying down or sitting. (orthostatic hypotension)
I'm 20 years old, female, no health problems

[Jerry_NJ]

The BP numbers are fine if you do not have any problem with dizziness when you stand or otherwise change you physical activity level.

An at rest HR over 100 should be checked, I believe.  

[Zachs]

Do these symptoms eventually go away after 10-15 minutes after standing and you can go about your day?  If so, then I wouldn't be really concerned.  

But by all means if it is affecting your daily routines, or for piece of mind, go to the doctor and have a tilt table test done.  Zach