Seasons every 4 months.
Blowing coat down to skin.
Not much flow when in season.
Does have a false pregnancy about 4 weeks out.
Have had thyroid checked.
Blood workup is fine.
I would really like to breed her soon.
Is repro vet next step?
It might be normal for her. Has she been bred? There are many things that can be wrong, cystic ovaries, split heats, immature follicles, etc.
If I were you, I would breed her and see what happens. If she doesn't produce a litter, then take her to the specialist.