All right, so when was the last time u two had unprotected sex?
If u only took one preg test and it came out negative, there are several reasons for that to be inaccurate.
1. U tested too early
2. The test was defective
so maybe u should get another preg test, take one now, and if it comes out negative, then take another one in 4-5 days, if still negative, take one or two more (just to be sure) in a 2-week span.
Becoz I dont know when u actually had unprotected sex, I cant say really surely....