Period or IB?

Hey guys ,

I am about 10 days late for my period I missed the whole month of may and freaking. Out that I might be pregnant because I am not trying to .

Last date I had sex was on 5/5/2021 (with condom)

I was suppose to get my period around 5/27/2021 my period are usually off by a few days sometimes 3 days early or sometimes 3days late or so , but completely missed the whole month of may . I am scared I might be pregnant . I did a pregnancy test a few days ago 6/2/2021 and did a blood test on 6/4/2021 all of them negative . Blood test came back with hcg <5 which is a negative . On 6/5/2021 I starting bleeding thinking it was my period and it usually starts light with cramps (which they were a little more intense this time around )but period gets heavier through out time but woke up today and it’s less blood in tampon . I’m scared I might be pregnant could somebody tell me if this looks like. IB or it’s just my period and just being weird this month .