13 days late, all 10 tests negative

Hello. 26(F) & my menstrual cycle is 13 days late. All 10 pregnancy tests are negative. Last intercourse was aug. 1, protected. I don't have insurance & the clinics I've looked up are book till the end of the month or til next month. All it has been feeling like is heavy & minimal ache. I'm just getting worried. Yes I'm been stressing but I just don't feel like that's nothing new. I thought it was just the eclipse that had stalled it but I'm not sure anymore. Anyone has any advice or home remedies to start a period. Thank you.