I need advice on a negative test

Okay so I took a pregnancy test yesterday I still have 4 days till my period but i don’t know I feel just out of its and vary emotional. With my first that’s how I felt so I decided to take a test... it came out negative but after a few hours it turned positive. Which I know it could be the test going bad. But I have been having my boobs feel sore. I feel nauseas here and there and Iv been having mild cramping. It’s usually just one side at a time. I don’t know... me and my husband are trying i know to retest once I miss it but do you think I could be pregnant?