Once your period is more or less regular, you can try the common suggestions to help increase your chances of getting pregnant, here are a few:
- Know your cycle: Understand the ovulation cycle to know when you are more fertile. There are subtle signs of ovulation, such as changes in basal body temperature and vaginal discharge. In general, for a woman on a 28-day cycle, she is most likely to ovulate on day 14 (taking the first day of the menstrual period as day one).
There are apps available to help track your period, you can consider those as well.
- Get your husband to avoid wearing tight fitting bottoms and stay off soy products, as these may affect sperm count.
- Stay relaxed and maintain a healthy lifestyle. Best to be at your ideal weight as over exercising may affect ovulation.
You can also get an ovulation test kit to help identify your most fertile days for trying (can get it over the counter, or purchase online).
In all, exclusively pumping should not affect your chances once your cycle is back.
Here’s a great link with more tips on getting pregnant (including food to eat, positions to try, and other forms of assistance you could consider):
http://sg.theasianparent.com/help-to-conceive-your-child/
Good luck!!