IUD or no??

I'm a 22-year-old black woman college student. I used to have irregular, heavy, long periods with bad cramping, fever, and lower back aches as side effects. Started having sex and taking Sprintec (28 day pill cycle) after 4 yrs of menstruating. Stayed on pill for 3 years. Helped with cramps, regularity, and lighter flow but I had moody pms weeks and gained unwanted weight. Later in the 3 years, I also experienced dryness. Don't know for sure that this is from the pill, but I heard it could be. Got off it in April. My periods are less regular now than when I was on the pill and I have terrible cramps again, but I'm less hormonal and have less bloating. I'm thinking about an IUD. Any advice on whether or not I should do that, and on which kind to get?