HPT Negative , Positive, Evaporate Line!

I woke up on 9dpo and took a hpt. I really didn't have any real symptoms prior of being pregnant except ONE day I had a little metal taste in my mouth and feeling a little nauseous.BUT i figured i had sex 2x that week of ovulation so it was possible I could be pregnant right?So i took the test 9dpo and I read it 3-mins and i only seen one line!So immediately i figured i wasn't pregnant or i took the hpt to early!So i left it on the sink and later i came home from work and i look at the hpt and notice it was 2 lines!?!I thought maybe its a evaporate line?So i purchase another hpt test and took it the next morning and to my surprise it read this!!!!So my advice is to hold onto that so call negative test and read it later u never know if u tested too early or read it to quick!Try to wait and test at least 10 dpo!Baby Dust to you all ;)