When you are at work, be at work.
Now you are comfortable with how your child is being cared for, when you are at work focus on work. If there is something going wrong the person caring for your child will call. Just ensure that the people in your office know that if the day care centre calls to track you down immediately.
You will definitely be more productive if you focus on the work you are doing rather than worrying about your child all day long, of course you will think about him/her and have photo's around to enjoy while at work. Work hard during the day and get all your tasks done so you can get home and enjoy your family time. Talk to your boss and see if they can be a bit flexible with your hours. If you are working hard and proving yourself by meeting your KPIs and budgets, why not ask if you can leave the office at 5pm and suggest that you will start earlier and point out that you are not taking lots of breaks during the day. That way you can get home earlier and get on with your hectic and enjoyable nightly routine. Many recruitment companies are going to be very open to this, especially if you are a good solid biller and work hard for the business. Some employers may even be open to you working a day from home on occasion; there is no harm in asking.
Let's face it, one of the benefits of recruitment is the commissions and bonuses you receive, and this is probably why you have chosen to go back to work in recruitment. So aim for those, set your expectations high and choose how you spend the extra cash on your beautiful family. If your employer is not being flexible at all, maybe it is time to find one who will be. You cannot maintain your happy balance unless you have the support of the company.