Random thought about 'early' symptoms.

Every cycle, at around 9-10 dpo I convince myself I'm pregnant. My boobs are tender, I'm slightly nauseas and I'm 100% sure this is it. Doesn't matter that it's a BFN, I'm testing too soon. I just 'know' I'm pregnant. 
Then AF shows up. 
The thing is, I've done HCG trigger shots that show up on HPTs but I have no symptoms. 
That means I'm not likely to feel any symptoms until well after it shows up on a test. 
I need to remind myself of this every cycle!