16 days late

We used protection, it might have ripped I’m not sure. I missed my period and it’s 16 days late according to Flo. I do have irregular periods but it was just becoming pretty regular because I’ve fixed my diet and all that. Anyway, just before I missed my period, I felt like my period was about to come any second around that time but it didn’t. I still have minor very slight cramps everyday. I tested the day I was late and it was negative.. too early to test? I don’t have any other symptoms.. Is it possible to be pregnant and only have slight cramping like a period coming? I’ve had the cramping since before missing my period till now.