That is too broad of a question. How is she breathing? Is she pale? are her fins healthy? This is a particular question you have to do actual research for.
The female guppy will develop a dark spot on the side of her belly during pregnancy. As the pregnancy progresses, the spot will grow darker.
A guppy is a fish and it swims in water. , Generally, they move up and down, side to side, and their movements are sometimes based on gender.
There are several things you can do. The first....is nothing. Especially if the birthing has already begun. The guppies are likely to try eating the fry (babies) but a few may survive. But try describing the blob a bit better. Because they don't give birth on their side.
It is not laying on its right side!
It doesn't matter which side. Either is appropriate.
things laying side by side
If your mare had a foal it should be at her side unless it was dead at birth and then it should be laying in the corral/pasture. Either way you will know
eggs should either be layed on their side in their normal state making sure the big side is always higher than the smaller, or in a carton with the pointy side down and fat side up
This is with every fish, the males bottom fin is like a spike as the females are like a circle.
Your guppy will be pregnant if it has been in a container with a male since it reached maturity. A none pregnant guppy is an unusual thing. She will develop a belly and also when seen from behind she will have a dark spot visible deep inside her on either side of her vent. (the gravid spot)
Your guppy is most likely suffering from swim bladder disease. If you go to your local pet store they might have something to treat it with.
its s probably dead check to see if the fins or gills are moving