15 min phone screening... should I follow up?

Last week Tuesday, I had a phone screening where the manager told me about the job and asked me some about myself and my previous jobs.

I didn’t apply for the position... she called me because she was sent my resume from another department i applied for and asked me to apply over the phone.

The conversation went really well but was also very casual. Should I send her an email thanking her for considering me for the position? Or should I wait another week?

Normally, I apply for jobs and then jump right into the interview so having someone call because they were sent my resume is new territory for me.

Thanks in advance!!

Edit: I applied for the position once we got off the phone, that same day.