when I conceived?

Okay so I think I conceived earlier than the 'normal ovulation days' because I tested positive on Monday of this week. It was pretty positive too not faint. Well this is my 2nd baby I'm 22 😀 anyways, I have an ultrasound tomorrow, I'm so anxious I cut wait. But everything is saying it's 3 weeks since my last period so I don't think I would have tested positive Monday if I ovulated when I was supposed too. If I ovulated on the day I think I'd be 14 days past ovulation when I tested positive. Sorry for the confusion 😂 I'm a mess right now lol. I also used ovulation tests for the supposed ovulation and fertile days and alll were negative. So I think I ovulated right after my last period which was June 18-22 🙄🙄🙄🤔🤔🤔