Doubting My Transition After 4 Months on HRT

I’m 24 years old, I’ve been on HRT (MTF) for four months. I feel very nervous because I used to be a straight guy. I want to marry a woman I am into women. I’m scared of being alone and dealing with health issues. I feel like being a trans woman isn’t biologically normal, so I ask myself, why am I doing this to myself? I just want to look feminine, and I already do -my hands, my feet, my face. Can I get FFS without HRT?