Hi, my female red velvet swordtail is around 2 weeks pregnant and she has started to spit out food a few seconds after she put it in her mouth. This just started happening recently and I have also observed a small clear, bubble-like space in her head. She has had it since Sunday and I really don't know what it is, maybe a tumor, gas bubble disease, cancer, etc. I will soon posts photos of her. I need help diagnosing what kind of disease or condition she has and how I can treat her. Thanks for the help.