Possible POTS Syndrome

Hey All,

So for the past 5 weeks I've been fighting a resting heart rate between 100 - 130 beats per minute, sitting is another, walking is another (around in house) and slight exercise jumps up to over 160 beats per minute within 3 minutes but the problem is the blood pressure remains low and doesn't come up so I get a lot of symptoms and it is difficult to complete exercise with the extreme exhaustion, sweating, shortness of breath and dizziness.

Saw a Cardiologist and am a very low dose of beta-blockers, not sure if working yet as blood pressure still low and beats still high, so am monitoring it daily.

Question is:  does anyone have info about helping me understand POTS as I am finding daily living extremely difficult due to the extreme exhaustion and daily symptoms I have.  I am a preschool worker and return to work beginning of Sept (and still hoping to do so) but know is very strong possibility of not being able to as I can barely cope with my own 2.5 year old daughter.  What has helped you? 

Thanks in advance!