1positive 2 negative

Stephanie
I took a pregnancy test 2days go that came back pregnant 1-2 since then I have taken 2 more pregnancy test that say not pregnant. Is it just to early or was my first test faulty I have had nausea vomitting headaches and fatigue 
Also have a uti idk if a uti can give you the same symptoms or if a uti can cause false posatives 
When I went to the er they did a pap and said not pregnant can you tell if someone's pregnant threw a pap