Second month taking birth control… will I get a period?

I’m taking progestin only pills for my birth control and I’ve very consistent with how I take my pills. 9 am on the dot every morning. I haven’t skipped a day since I started.

I’m now 6 days late for my normal time when I would normally be having my period. But I did engage in some risky sex with my significant other. If he ejaculated in me a 3 times total, how safe am I from pregnancy? (This was two weeks going on three weeks ago)

I don’t feel any common symptoms of pregnancy and im not spotting or anything. Just a maybe missed period so far.