Were you in the correct toilets?
You parted, you and your friend of 20 years ago, under awkward terms(Or she is about to come back into your life, at an awkward, and unexpected, time.) The fact that you carried on doing what you were doing shows that you were untroubled by this intrusion.
The question asked is not always a sign that help is needed. The fact that you said you were doing the very same, could indicate that she knows this and is offering help, now that you have confirmed her thoughts. Assuming you answered her truthfully.
Something you did many years ago is about to resurface. At an awkward time, for you, but you'll seek to dismiss it. Don't, there may be good news on the way.
Which side did she stand at, left or right. And did this change as a result of your answer?
Seems a daft question, however you will notice that we tend to scan left to right.
On the right to both the above questions, you have something to look forward to.
On the left for both questions, you are leaving it in the past. It's gone, but you'll wonder what might have happened.
Similar with her moving from right to left. Left to right is your past catching up with you and you taking it forward.
Did you wash your hands after your wee wee?
I hope you did!