Sayang, this really needs another doctor's opinion, go back to the hospital or see a different gynae, sebab the home tests showing positive but hospital urine test negative is confusing and needs proper checking, okay? A few of my mum friends went through unclear results like this, and they just got a second scan and blood test to be sure, sometimes timing or the type of test makes a difference. Your symptoms (late period, back pain, bloating, palpitations) deserve a proper answer lah, not just "nothing there." Don't settle for one visit if you're not convinced, you know your body best, and 15 days late plus positive home tests is worth investigating properly. Go back when you can and ask them to do a blood pregnancy test (HCG) if they haven't already, that's more accurate than urine sometimes. Take care of yourself, and jangan stress too much while waiting for answers. You'll figure this out.