Is it possible?

My boyfriend and I had sex this weekend but we used the ENZ trojan condoms. When he finished he cleaned himself up. When we went to have sex again he went in without a condom but took it out almost right away. My <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> calendar said that day my risk of pregnancy was 3%. Could I be pregnant or am I just stressing over nothing?