Help me please

Long story short, my periods have always been the same. I always start around the 18th or 19th. My cycle is 28 days and my period is five days long. It's always heavy. I'm not on birth control and my husband and I rarely use a condom. I have no stress and my daily has been the same as always. Last month my period was 15 days late (so I had one on the 2nd of this month) it was EXTREMELY light, wouldn't come and go, and only lasted about three days. About 5days ago, I had drops of blood that was pink and brown, only a little and some super light, super slight cramping. Then nothing. It's now the 24th and there is no sign of my period but my husband says I'm showing signs of early pregnancy. Like I'm always nauseous, I eat all the time, and I'm super tired. I took a test a few days ago and it was negative but I was thinking I took it too early. Help please