Small painless clustered bumps that appeared over a few days in this area are commonly either genital warts linked to HPV, molluscum contagiosum, or a harmless skin reaction, and these three can look quite similar in a photo. The lack of itching, burning or discharge doesn't rule any of them out.
Next Steps
Please get this examined in person soon, since telling these apart needs a close look rather than a photo. Avoid touching or scratching the area until then, and let your partner know so they can get checked too.
Health Tips
Please see a gynaecologist soon, and come in sooner if the bumps grow quickly, multiply, or start to hurt or bleed.