Skipped period

Most likely you are not pregnant as it should be plenty late enough to get a + hpt. You probably aren't late you it's likely just ovulated later than you thought. The ONLY way to know is if you chart your temps and that confirms the date you ovulated which will tell you when your period is actually due. 

Just relax. Try to retest in 1 week if AF doesn't show! It's normal to be sometimes 1-2 weeks late. Did you recently came off of BC?

yes you should be go to the doctor