Agreeing with Shevia. Ledonna, you glow.
When I was PG with my March baby, I ended up wearing a coat of my husbands. Get something really big. You might look at men's costs when thrifting. Your little nugget will probably grow a lot yet, but everyone is different. Any tops need to be longer than you can imagine if you don't want bare belly peeking out. Good for you to keep walking and getting as much exercise as you can fit in.
Btw, my mom had a baby ( my brother) when she was over 50. She said that he was the easiest delivery.