Waiting to hear back on an interview I had this week?

The person who interviewed me, the VP of the company, mentioned she really liked me and our interview went on for about 40 minutes and covered pretty much everything. She said I would hear back by today. The work day is almost over and haven't heard from her, should I give her a call right before the end of the work day to check in? She mentioned she wanted to have the start date decided by next week and I want to make sure I don't miss the date or schedule any interviews or accept anything if it happens to come up if she does want me for this one.