5 days late but negative results

My husband and I have been trying to conceive since July. My period is normal most of the time, except for a month here or there. During my last ovulation, my husband and I had sex just about every day that week. My period is 5 days late now and I’ve tested three times with the same type test each time. All tests were negative. I have no symptoms of starting my period nor being pregnant. Should I buy another type of test to try or should I wait a few more days to see what happens? Any advice would be greatly appreciated! 💕