I just bought a pregnant platy from the pet store about 2 hours ago and put it into my tank. I made sure to acclimatize it and everything. When I first saw it at the fish store it’s tail was closed a little bit and it was sitting at the bottom of the tank. I thought that this is probably because it is very pregnant. Even now that it is in my tank it’s tail is still closed and it is swimming around a little bit but is mostly at the bottom. It doesn’t seem to be struggling to swim but just sitting at the bottom with its tail closed up. I was wondering if this is because she is pregnant or sick? Also a side question I have is how soon do you think she will have her babies based on the pictures?