I've been on birth control for two years now. Two months ago my doctor switches my pill brand. Two weeks ago (Saturday), I took my pill but threw up shortly after taking it so I took Sunday's pill. Sunday I missed my pill and had unprotected sex with my bf. On Tuesday I started spotting which felt like my period. This continued until Saturday when I had my last pill of the pack get lost. I found it on Monday afternoon and took it. I spotted until Wednesday for a total of 8 days. I should have had period on Wednesday and it still has not come. My bf and I had unprotected sex this week a few times. He makes sure that the does not finish in me everytime. Should I be worried I'm late?