Writing & Researching Historical Fiction

I had decided to complete the first draft of my new novel, Tuesday's Child, a traditional Regency Novel, without pausing to research. Until yesterday I put a word in bold to remind me to research a fact when I work on the second draft. Having made that decision I decided on the minimum number of words I should write every day in order to finish the first draft by mid December. Yesterday, the current chapter didn't evolve according to plan. I spent most of the time dedicated to writing researching essential facts and failed to complete my self-imposed number of words. That is annoying because it's so difficult to find time to catch up when I don't reach my targets. If I had a report card I would enter :'Must try harder.'