Still waiting for that heat

I am not really sure which is worse. Waiting for heat to start, waiting for the first signs of pregnancy or waiting for birth to start. There is only one thing that it sure and that is that there is a lot of waiting in the process of making a litter. Oonah is still not showing any signs of heat being there but she is very interested in leaving the trace after herself almost everywhere on our walks. This makes me hopeful as it usually is the first sign of the approaching heat.