So I usually start my period on the 3 or 4 oft he month. Well last month I started the 3rd and then…

So I usually start my period on the 3 or 4 oft he month. Well last month I started the 3rd and then again von like the 24 so that was twice I had my period in one month. I took 2 pregnancy test and they both came back negative.

But my question is this. Is it possible to has your period twice in one month. And then have 2 pregnancy test that come back negative. And I still have not started for this month either and I was supposed to start already. And I am 5 days late for my period this month. Should I test or no.