Pregnant or stressing?

Hi everyone, so we are trying for our first baby so I'm here looking for some advice! I am now two days late and normally right on schedule. I normally have extremely sore breasts 1 week before my period and this month that wasn't the case. I woke up to tender breast this morning but nothing like the usual. I have taken two at home pregnancy test that both read negative. Could it still be too early? How long should I wait to call my OBGYN? Any insight would be greatly appreciated! Thanks in advance