Could I be pregnant? Pls help/offer your experience

My boyfriend came in me while I was ovulating in June 4-6 (all of those days) and i just stopped bleeding, but I started bleeding on the 18 and bled for three days but it was very light and I had no cramps, no back pain and no sore boobs which is what I get every time I have a period. I’ve been having massive headaches, feelings of light headedness, and nausea, but not throwing up. Is there a chance I could be pregnant? I’m Afraid to test cause I want it to be positive but I don’t want to be disappointed. Some advice or your own experience would be helpful! Thank you!