Need some advice.

This is my first month activity trying to conceive. I bought opk and my high started on aug 16-20. Peaked on the 20th. My last period was July 21-24. I haven’t had a period yet but feeling nauseas and have thrown up in the morning or sometimes at night. I feel really bloated and not hungry. Which is weird bc before a period I always eat so much. I’ve had light cramping only on left side. And I’ve felt tingling in my breasts. Which isn’t something I’ve felt before. The symptoms come and go. Does any one have any advice. Could I be pregnant?? Or is my period coming. Or is it something else. I’m scared it’s not pregnancy and these symptoms are all something bad.

Also if ovulated on those dates. Which date was the highest chance to get pregnant? On peak day or after? Or before?