Your bloodpressure is on the low side but better to have low than high. My bottom number is usually in the 40-50-60 range but do have systolic hypertension (top number. No matter what I do, meds or exercise the bottom number remains in that range. Therefore, cannot take more meds to bring down systolic without lowering diastolic too much.
If you have no problems fainting, light head, etc. don't worry. You may wish to ask you doctor about it next time to give you peace of mind.