Spotting for like a month

Maria

So my period has been a little weird it's been lighter then usual the last 2 month and I have been spotting on and off for the last months also. I am concerned I plan on making a dr's appointment but at this time due to health coverage issues I can't but I'd just like to see if anyone has had the same problem and what was the reason for that. It's not an STD me and my partner have been tested and we're both ok and have only been with each other. I have the IUD para guard have had for 5 years now... and it made my periods heavier so this is unusual for me. I don't believe I am pregnant I have no symptoms of that. So I have no clue. Has anyone ever had this issue and if so what was it. I'd appreciate any comments or any type of idea on what it may be. Thank you guys in advance.