Could I still be pregnant?

Heres the story: I had sex on June 13th and missed one of my Seasonal birth control pills. I researched and found out that you can become pregnant from even missing one pill. So I waited two weeks and went to my doctor for a urine pregnancy test. It turned out negative. Anyways I’ve been lately getting a lot of pregnancy symptoms such as nausea, breasts really sore and swollen, tired and sluggish, very crabby and hungry, cramping and this bubbly like feeling in my lower abdomen. I was just wandering if two weeks is too early to tell on a urine pregnancy test? And when should I test again?