Abnormal 4 day period

Callie
Had my copper IUD removed Jan. 23rd and started a 5 day period Jan. 25th right on schedule. However, I spotted for 3 days after my period which is not very normal for me. My husband and I are trying for our first child and are following a calendar to track ovulation. I had many pregnancy symptoms before my period which was due Feb. 22nd. All pregnancy tests were negative and I started my period on the 23rd of Feb. it was light until the 24th and 25th and red medium flow. Then today (26th) it stopped altogether. I normally have a 28 day cycle with heavy flow periods lasting 5-6 days. I'm concerned this light period may negativly effect my chances of becoming pregnant next month. I had my iud for 3 years with no troubles at all. I'm in my early twenties.