Trying to figure out the lesser of two evils

I went to my old job to get my glasses adjusted (I used to work for an optometrist office). My boss knew I was pregnant - I told him when I got my eyes examined. My brother also works there, so, obviously, he knew about my miscarriage.
I was unsure who my brother told, if he told anyone at all. And if he did tell anyone I was pregnant, did he also tell them I miscarried? Every time I went in there in January I was asked by someone, "Are you pregnant yet?" I was actually nervous about getting asked that question given my bi-polar emotional state of being at the moment.

My boss came out with a patient and said a quick hello. He said he had heard about my "circumstances" and was sorry.

"Thanks." I said.

Then he stood around and tried to think of something else to say before he finally said "There really isn't anything right to say."

"No. No there really isn't!" I actually said it with a laugh.

I thought maybe that would be it. I thought I would get away without being asked. It was kind of busy, so no one other than my brother really had time to talk to me. I decided to stay for a few moments and look at frames, and that's when I got bombarded by one of the "newer" employees.

Really, I don't think I can say she's new. She worked at an affiliate office when I worked for the company and she has helped me several times over the past year and a half. I don't expect her to remember everything about my life; she's sees hundreds of people every week. But she asks me the same questions every time I've seen her. I feel like she ought to remember something.

So I got asked the same questions. Do you live near by? Did you get a new job? How's married life?

Then she asked, "Are you planning on having kids soon?"

Oh, first I should say I really didn't want her following me around. So her presence started off as an annoyance to me. All I could do was nod at her question.

Then she asked in a whisper, "Are you pregnant now?"

"No."

She gave me a questionable look. Then she acted like she thought I was. Which made me wonder what did my brother tell people? Gossip travels fast in any workplace; I wouldn't be surprised if someone overheard a conversation between my old boss and my brother at some point in January or February, then started telling other people in the office.

So, seeing as I said "No" instead of breaking it to her what really happened, she decided to follow me around and talk to me about what a special time pregnancy is and all about pregnancy hormones (from what her sister in law told her; she's never been pregnant). I wanted so badly to interrupt her and tell her I know all about it. I don't need someone who hasn't experienced it at all before telling me how it is.

I don't know why I didn't just tell her what happened. Maybe because I was also surrounded by people who I didn't know? It definitely would have spared me the discussion of pregnancy at all.

When I left I wondered which is the lesser of two evils? Tell people right off the bat when they ask if I'm pregnant or am I trying? Or just say no, put on my happy face and walk away?

I still haven't figured it out.