Pregnant?

So I normally start around the 5th of every month. I had a period this month and my boyfriend and I do not have protected sex. But we have never for 4 years. I've been having pregnancy like symptoms for two weeks now. Boobs are sore and are NEVER sore this soon and not normally till the second day into my period, nauseous, very sleepy, hungry and never can get full, gassy, bloated, and I read if you squeezed the nipple and milkyness liquid comes out that that's a early sign too so I did and it came out, very back lower back pain, and cramping very low in my pelvic, and my teeth are now sensitive and never have been. I took a test but it was negative am I taking it too early? Do you think I am?