Cheap dollar store pregnancy tests

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Hey, all!
I was wondering, for those who (like me) bulk-buy the generic brand tests from the dollar store, how early you've been able to get a BFP from them? I know they're not as sensitive at early detection but I'm 11 DPO and I really think this might be it (!!!!!!). But I only have two tests left and I don't want to waste one if it's really too early to tell with these.