Bfp to be

So I just got off the phone with my older sister (25 y/o) she's 8 months pregnant with her first & I was asking her what her first symptoms were & she said that she only felt emotional, no other symptoms. She was also telling me that she was testing non-stop & got all negatives. When she finally tested positive she was 4 weeks pregnant. I was asking her cause I may be expecting, I feel different, but I'm testing negative & it's still prolly too early, but anyways don't get discouraged by the negatives :)