Could i be pregnant?

Hello ladies, I was predicted to have ovulated on the 5th July, i havent been thinking about it at all This month as I've been a bit busy, im late for 1 day now (roughly 17dpo) and I had a small pin prick of pink creamy cm? Could af be coming? I've not really had any unusual symptoms, i was sick this morning and I felt really nauseated after my breakfast, ive been smelling candles a lot stronger to the point its burning my nose and giving me a headache but my oh said he could barely smell the candle. Im not testing until 4 days late just in case but what do you think? I'm also extremely tired, have to fight myself to stay awake past 7pm