4 days late tomorrow...

Hi guys! Need some advice. I’ll be 4 days late tomorrow i had some light bleeding for not even two days on the 27th and 28th. didn’t even need a pad only when wiped. On and off all the time and had some old blood on the 30th when she was due to come. Like two spots! No sign of her coming (I’ve taken 5 tests hah and all negative) but I only have 6 tests left and I live in remote Australia so buying some has to be online and can take months to come in by plane!!! 🙃🙃 should I test tomorrow or save my tests????? I know some women get positives for up to 2 weeks sometimes?! Helpppp 😭😭