Is it normal to have so many symptoms so early

I had just found it im pregnant this morning but I knew beforehand because I was experiencing tender breasts, alot if nausea and heartburn, an inability or desire to eat, food aversions, acne, extreme mood swings irritability, dizziness and light headedness, bloating, gas and just being exhausted non stop... the app puts me at 3 weeks which I know is really early early.. is this normal or a bad sign

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