pregnant?

i’m on the pill, but i have missed/doubled up on pills or took them later than usual. my bf and i have sex literally everyday, for the past week or so i’ve had constipation, headache, nausea, and my boobs have been hurting. i took a test two days ago and it was negative, but my period was due yesterday and i still have no sign of it. was it maybe just too early to take a test?