I can't see the pics, which they must have removed if they showed your genitals. We don't allow genital pics on the site.
A fluid filled spot - is it hard? Soft? Does it look like a blister or more like a pimple? It could just be blocked oil gland - much like a pimple. There are oil glands all over the labia, and they can get clogged. It's called an epidermal cysts. If they aren't infected, they are white or yellow and usually less than 1/2 inch (about 1 centimeter) in diameter.
If it's near a hair follicle, those can also get clogged.
You may have just irritated it with the sex toy use for a long time, so as long as it doesn't blister, see how it does for a couple of days. If it doesn't go away by Friday morning, or if it shows signs of infection - it grows, gets warm to the touch or the skin around it gets very red - get into to see your doctor.