No period, negative pregnancy test

I've been feeling nauseous, have frequent headaches, and I'm tired all the time. I've been hungry all the time. All the signs I had early when I was pregnant with my first child. I only missed my period yesterday but got excited and took a pregnancy test this morning, which showed negative. Someone said it may be false as it's best to wait a week. I'm a bit of a hypochondriac and other times I've had negatives I've moved on, but I still feel sick today and this time seemed different. I don't want to get my hopes up but are false negatives common? On 're flipside I thought my period was starting earlier because a had discharge that looked like dried sticky blood. I put a liner on and had 2 tiny spots hours later but since then - nothing, not even clear discharge. Opinions on what my body thinks it's doing? Lol. Now I'm just in anxious uncomfortable limbo.