I just want to know !!

Being that I just had a baby 7 months ago I know the symptoms of being pregnant all too we'll . So I thought . But with number one we werent trying I had no idea untill I went to the doctor and they did a test . Turned out positive . But with number one I'm over analyzing everything ! Any little uncomfortable ache I feel I  relate it to being pregnant. I have had cramping on and off throughout my 2ww . Had implantation bleeding on Sunday at 9dpo (I think ) I get bloated every time I eat . I've been exhausted all week basically!! I have Back Aches , I've felt pressure in my lower abdomen on and off . I'm 11dpo but testing negative . If I get a first response early result test would it be accurate if I test at 12dpo?