Did the pullout method fail me or am I going crazy??

So my last period (which is usually a regular 32 day cycle) was on the 5th of March. Around the 10th of April I began to get very bloated, nauseous and tired all the time not even realizing that I was already 5 days late as I work shift work and days fly by without notice. I do have regular sex utilizing pullout as the only method of "protection" with my significant other.

A few days ago I took a pregnancy test which came up negative but the symptoms have not subsided. While my breasts are not sore I am lucky if I can finish a meal without wanting to run to the bathroom. I have not vomited as of yet, simply because I work very hard not to, but the urge has been very strong, especially at a resturant.

Am I crazy to think that the test may have been wrong? I have never been this late before, but the tests do say they are 99% accurate.

Do I just need more time before testing again?