On a road that comes to a stop sign, and then veers slightly to the right, do you need to use a turn signal to stay to the right?

Question

Please note there is no other way to go legally except to the right. This road has a triangle that you have an option to make a left turn before it if that was the direction you wanted to go. Once passed that (about another 50-60 feel ahead) there is the stop sign and the road curves to the right. After stopping, I was given a ticket for continuing onto the road without signaling. I've lived in the area 30+ years and have never signaled there, and anyone I've asked agrees. Travelling from the south to north, stopping at the stop sign then continuearound that curve... would a signal be legally needed? See my very crude sample... also the distance between where you could go left, and the stop sign is only about 3-4 car lengths in real life. TIA.