Oh god, I can totally understand how terrifying this situation must be for you, my heart is racing just reading this. Please try to take a deep breath. Don't worry about doing a test at home right now. You need to call your gynac immediately because heavy bleeding during pregnancy is something only a doctor should evaluate.
Look, let's be very practical here. Heavy bleeding is absolutely not something to ignore or try to test at home. Put the test kit away and go straight to the hospital. Your gynac needs to check you right now to see what's actually happening.
Actually, heavy bleeding can interfere with test accuracy, but more importantly, it is a clinical emergency. It is highly recommended that you consult your obstetrician immediately rather than trying to diagnose this at home. Please contact your doctor's clinic right away to be safe.
Usually I suggest simple home remedies for small issues, but heavy bleeding is a major thing, dear. Please don't try any home tips or wait around to see a test line. Just call your doctor or visit the nearest clinic immediately. Let them check everything properly.
Sending you so much love and strength, please don't panic. I remember how scary even a single spot of blood felt when I was pregnant, so heavy bleeding is definitely stressful. Just leave the test for now and call your gynac immediately to get checked, everything will be fine.
Honestly, if you are bleeding heavily, please don't waste money on home test kits right now. Those kits are expensive and won't solve the issue. Go directly to a nearby government hospital or clinic, as delaying this could lead to much bigger emergency expenses later. Please get checked by a doctor first.