Ovulation, Precum & Sex

I had sex twice today, but we used condoms. The partner that I had sex with thrusted a few strokes raw before putting the condom on, but I'm on ovulation week. My cycle is always predicted accurately by <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> (period comes on the day predicted by <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>)

I'm worried that I'll get pregnant from this, and I'm 18 days into my cycle, with 2 more fertile days left.

His penis is wiped dry, and I made sure theres no visible fluid on his tip before inserting it for a few strokes.

Am I overworrying? I'm not sure if such method works.