Can I be pregnant?

jessica

So I had relations with my boyfriend on days 19 and 20 of my cycle. I haven’t been tracking my ovulation but I did notice an increase in cm on days 17 and 18 of my cycle. According to the app I was supposed to ovulate a few days before this so I didn’t think much of it. Well I was supposed to start my period today and nothing. No cramps or any of my normal symptoms. I have noticed my breast hurt a little and I’m incredibly nauseous but that’s about it. Could I be pregnant? Is it possible I ovulated later than the app said? And if so when should I take a test? It’s day 29 of my cycle so I had relations about 9-10 days ago.