Possibly pregnant?

Mia
Hey everyone, I'm pretty much just looking for some advice or opinions. So I'm 18 years old and I've been on the pill for probably about a year now. I'm not really good when it comes to taking it on time though, I never take it at the exact same time every day, it's very different and random times and sometimes I'll forget to take it altogether. I have a long term boyfriend of about a year and a half and we have sex without condoms pretty often. My period is about a week late, which has never happened to me before. I've been having cramps and stomach pain/nausea. I took a test last week when my period was 2 days late and it was negative. So I'm not really sure what to do. Any thoughts and opinions would be really helpful!