6th week missed period

I tested on my 6th week of my missed period and it was a negative with the digital blue clear. I am going on my 7th week of my missed period. Is it possible that I could be pregnant? We have always been safe and we use condoms but idk I get nervous. I have noticed I have been skipping months recently so it may also be an irregular period. I just want opinions on what my chances are that the pregnancy test at home is accurate and reliable.