It’s understandably difficult to feel like part of an out group. Remember not all cis girls get periods either. But there’s also other symptoms associated with a period besides just menstruation that many trans girls do experience. Might be worth tracking changes in sleep, mood, appetite, watching for symptoms like headaches, night sweats, dry skin, diarrhea, stomach cramps, fatigue, acne. You may be having a period, it’s just much less obvious if you’re only looking for menstruation