Hpt/TTC/taking forever

J
Which htp would you say picks up the hcg hormone the best?
 I'm due for AF in 6 days but I'm wanting to test early. I've been nauseas in the morning, my boobs have been kind of sensitive and I'm getting impatient. Lol. My husband and I have been TTC for 7months with no luck yet. This would be our third baby. My two others happened quite fast so I'm kind of upset this time is taking so long. 
Best early detection HPT?! Annndddd GO! 
Tia :)