Hard to tell then. However, you've been taking 2.5 per day since Monday?I have done around 2.5mg since Monday (not perfect splits of the pills -- and been taking the bigger half). Now I am stuffy and feel sick, but I think I felt something coming on already on Monday too so not sure if I am actually sick or was super sensitive to the side effects. Ugh.
I would suggest 2.5 one day and see how it goes. And yes, too much makes be very stuffy and almost feeling sick.