Firstly, you can get a HPT done after avoiding any contamination of the sample. If it is positive, then you should consult your gynecologist for a checkup,blood test
and a sonogram if needed to assess the situation. Urine color does not change in pregnancy
unless it is high colored due to dehydration
. Since, you have abnormal blood flow, it could be a threatened pregnancy, given your associated symptoms as nausea
is not much a part of PMS. Please get further suggestions from your doctor. Take care.