No OPK positive but think I could be pregnant

Cycle 3 TTC... done OPKs since cycle day 10 and no positive as interpreted by <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> but cycle day 11 was the darkest pink. We also had sex on cycle day 11. My period should now be due in 7 days and I’ve had tender boobs and one day I had slight shooting pains in my boobs which I never normally have any time during cycle. Could I be pregnant or just wishful thinking? I plan to do early detection test in a couple of days. This is a picture of opk from cycle day 11...