What should I do?

Me and this girl I’ve been seeing have hooked up twice. On the first date we got physical (no intercourse) and the second date we have had an even better time and it was more comfortable. I called her a couple days later and she said she was with her friend so she couldn’t pick up. I told her to call me when she can, but she still hasn’t called in it’s been almost a week. Usually I don’t pursue unless the energy is reciprocated, so should I reach out or let her come to me?