New to this! Alot of early symptoms

I don't track my ovulation, but if I am pregnant I am a little over 3 weeks. I've been feeling off and different in addition to other symptoms:

Nausea/vomiting (I've thrown up about 5 or 6 times)

Weird stomach pains (sometimes they feel like mild charlie horses in my stomach, sometimes cramps, sometimes the pains are in my lower abdomen, sometimes higher)

Back feels bruised on my left side (wouldn't have put this cause I could have just hit it but saw someone list this before)

Nipples sore to touch

Nipples have been tingly a couple times

Bloated

Itchy

Food isn't satisfying/taste different /bland

Stomach feels empty but no appetite

Headache

Extreme fatigue

Frequent urination (could possibly be a uti)

Is it possible to have symptoms this early? And is it normal for the symptoms to b on and off? Thanks ladies!

PS. Have taken a few tests and all negative, Im thinking it may be too early? But if I'm having all these symptoms then hormones should be going crazy so why isn't a test picking it up?