I think I’m 3 weeks pregnant not 4

Every test I have taken even different brands are positive but faint apart from the digital, I know we DTD on the 9th so I would of ovulated some time after that never track due to fertility problems I am right in saying I’d about 3 weeks aren’t I? Going off my last cycle which was 34 days long that would make me 3 weeks 6 days 🤔