Welcome to the forums!
Yes, if your blood pressure is climbing that much even with medication, you are at risk of progressing to preeclampsia. Adding another blood pressure medication might help control your pressure, but will not affect the progress of the disease causing the hypertension - it will protect you from stroke, however. I am not certain about the abbreviations for this part: URE check pus cell 30-40 /hpf and epitherial cells 15-20 /HPF albumin (++) but if that is +2 on a dipstick urine test, you may already have preeclampsia.
Symptoms to watch for include bad headache, decreased fetal movement, spots or flashing in your vision, pain in your upper right abdomen. Are you being seen frequently? Has your doctor talked about early delivery, or steroid injections to mature the fetal lungs more rapidly?
Please keep us posted as you are able.