Pregnancy struggles

Hello ladies , I’ve been trying to get pregnant for about an year . My last PMS was April 19-23 . I have a 30 day cycle . Some of the <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation apps</a> told me I ovulate on day 16 , which is today . I’ve had sex on April 28 , May 2 , & May 4 . Is there a possibility I might get pregnant? Please help .