I have checked my tank parameters they are Nitrate 40, Nitrite 0, Hardness 150, Chlorine 0, Alkaline 0-40 (not 100% of the color of 40 but too dark to be 0) pH 6.2 temp about 77F. I also have live plants (too many at the moment as I'm cycling a new tank and need these plants in with the mollies now because I have baby fry I want to keep and that is their hiding spots.) the 10 gallon is a bit crowded atm with live plants. however my "Big Momma" is prego of course but she is acting normal except she's chomping at the water not at the surface for air but it almost looks like she's having a hard time swallowing something she will swim around chomping and stretching out her mouth will big. she's still picking at the plants and sides of the tank like normal, chasing her husband away like normal (I have 3 adults 2 f and one m and one juvenile with 2 fry) last water change was a week ago. Should I just do another water change and see if that helps her or is there something actually wrong?