Curious? I’m having a hard time 🙄😭

Molly 1son💙 1angeldaughter🎀

So I got my positive test on the 19th but my temp dropped and then spiked back up the next day...so does this mean I ovulated on on day 20? Or earlier? I was having ovulation pains on the cycle day 18. The test was dark but not completely positive until the cycle day 19