I am having a similar issue. I got a betta because he was very sickly. Popeye, cloudy eye, severe body rot, lethargy, the works. Now, he is doing much better but I am not sure if he is male or female. His fins were mostly rotted off when we got him, now they are growing back but I am unsure whether it is a boy or girl...... Ideas? Picture coming soon!
No sign of ovaries that I see and the body shape does look like male. But the best way to tell in sexing young is looking for the ovaries and with the light coloration you have it would be very easy to see them it it was female.