Help please


So I was wondering, last month my period was like by 9 days I took test and all and it all came back negative , (I had condom sex and he pulled out too(no leakage in the condom)) eventually my period came on June 29 and continued to the following month July 4th now its July 31st and I haven’t gotten my period. It’s the last day of this month, do you think having my last period late effected this one? Will I get it on the first week of August? I don’t know. Please help