Need some help

I started me period like normal on 9/9 and it lasted till 9/14 like normal then on 9/25 till 10/1 I had another period the period was normal for me but the timing was not I was scheduled to start my period 10/6 but still have not started I have taken 2 tests last week and I am going to take one tomorrow morning can anyone give me some advice I'm not sure what's rly going on I am about 20 days late if I didn't have that one period that was out of the blue but still counting that I'm 4 days late what do u think