anyone had any bad experiences with internet cheapies??

hi ladies just wondering if anybody has had bad experiences with IC not showing anything?? I'm 11dpo and past few days been feeling bloated, gassy, hormonal to the point of crying constantly, vet sore boobs and back ache as well as waking during the night for the toilet....I know all these could be signs of AF but iv really felt different....tested this morning 11dpo and I can't see anything :( I mean maybe a slight shadow but that could be my eyes...r these cheapies any good?? do they not work for everyone?? or is it still early...I'm confused...wish it was just simple yes or no...Af due in 3 days.