11 blocks is the daily minimum for an adult female. Pregnant women, and also breastfeeding mothers, require a minimum of 13 or 14 blocks daily. You can find this pregnancy block recommendation with a search of this site.
Dr Sears recommends fish oil for pregnant women. It's not necessary to split you dose into 3 smaller doses daily. It's fine to take it in one dose daily, all at the same time. Either type, Omega RX or Eico Rx, or a combination of the two, should be fine.