Teen pregnancy?

On cycle day 10 I had sex with a friend. (My cycle is usually 32 days). We used protection the whole time and he even pulled out when he finished. What’s worrying me is that I’m pretty sure I ovulated the next day because I had super sharp pains on my right ovary and the pain kept going on for about 4 days. I’ve then been feeling nauseous for like a week now. My discharge was also super watery and it usually isn’t like that after my periods. and now on my 21 day cycle I’ve been having back pain, super nauseous, constipated and I constantly have the urge to pee. Could I be pregnant ? Or am I just being super paranoid?