Ugh confused

I feel that I am pregnant. I have a lot of symptoms but took a test tonight and it was negative. But I feel that my symptoms are getting worse. My belly is definitely not as flat anymore. for the past week I can barely eat, I get so full so quickly and I am nauseas all day long. Now yesterday and today I have had the most excruciating headaches. These symptoms along with heartburn (which I never got before), extreme fatigue like the most I've ever wanted to sleep in my life, bigger boobs but they don't hurt. I guess peeing a little more often. Back pain. Did anyone else have these symptoms at about 4-5 weeks? And maybe got a negative pregancy test? I user e.p.t.  Brand and I tested at night, not morning