I had two periods last month and i started spotting and the blood was light pink. i have been having sex. should i be worried?

2 normal periods?: A woman with cycles shorter than 29 days (shorter than 1 month) will likely have 1 ovulation per month during the year, but have 2 ovulations during one month of the year (since she has about 13 cycles a year). That means having 2 normal periods in one of the 12 months of the year, without other problems, is not something to worry about.