Is my tetra bearing eggs or sick/infected ?

Hi everyone, recently set up a 105L or 28 US gallon planted tank with fluval strat as a base layer with aquarium sand on top with 6 or so various plants and a driftwood centrepiece. I cycled the tank for 10 days atleast before adding 4 mollies, waiting a week and adding 6 flame tetras and three guppies. I then waited another week and added two Kuhli loaches. I heat my tank at 26 degrees Celsius 24/7 and keep the light on for around 10 hours each day. My fish are fed twice a day with flakes and a small German food for my loaches.

Sorry for the long introduction just wanted to ensure there was lots of information.
One of my tetras has a large bulge on its underside which is different to my other tetras so I presume it is not necessarily overweight however may be bearing eggs or have an infection. I have attached some images please let me know asap! Thank you all.

I also forgot to mention the tetra often stays low at a corner of the tank but often comes out for food or a swim which also led me to believe it could be pregnant. This is my first tropical set up and would appreciate any advice given!

Probably just likes eating. If it gets bigger or changes shape, post more pictures.

Will do, thank you!