Not sure when i ovulated last.i unprotected sex but he didn't cum inside. about a week 1/2 after my period, i spotted. now my period is late&neg test?

Give it some time: It is still possible to become pregnant even if he did not ejaculate inside you. Pre-ejaculate can contain viable sperm. Let's give this a chance to develop, though. My suspicion is that you are not pregnant. I am a bit confused by the timing you describe in your question. Regardless, you should be practicing safe sex if you choose to be sexually active. Talk to you gynecologist.