Had a first date with HB8 today but I'm going on vacation in 2 days for 3 weeks. Escalated, kissed, touching, teasing but didn't fuck.

Normally I wouldn't text her until the next date, maybe in a week (logistics only), but in this case if I text her in 3 weeks it would be too long and it would seem like I'm not interested in her.

My goal is to fuck her and potentially make it a plate.

How to proceed in this case? Should I tell her in a way or another that I'm travelling for some time? If yes, how so?