Copper coil (IUD) and breast enlargement

I got the Kyleena coil fitted in Jan 2025 - just for reference I am a 5"3 23yr old without ever given birth - the insertion was very uncomfortable but not the worst ever, I did it with my sexual health clinic as I find they are more patient and kind rather than a quick GP / hosp appointment. My 11 months with the coil were overall great, except extreme contraction like pain and very occasional periods that would either last hours or a day. I didn't bleed every month but would get the odd few days of a period, quite unpredictable. I got a scan in July time just to make sure it was in the right place due to the amount of pain I was getting, and was all fine. In November 2025 I suddenly got excruciating pain and was told the coil has moved (perhaps explains the contraction pain throughout the year, I presume my body was rejecting it). Thankfully I pushed for another scan otherwise I would've kept having unprotected sex lol. Despite all the above, I am getting another one fitted because it is a trusty bit of contraception - just be aware if you experience a lot of pain in the lower tummy, to get it checked out!!

I had the coil for 18 months, and while it offered some positives, it was overall a challenging experience for me. The insertion was unpleasant, and I was left feeling emotional for the rest of the day, which wasn’t something I was fully prepared for. I experienced unexpected heavy bleeding on random days outside my regular menstrual cycle for about three months. My periods, although they became regular, were very heavy and painful. Some months were more manageable than others, but overall, my periods were awful. I also had a constant feeling of pressure and a dull ache in my lower abdomen, which turned into sharper pain two weeks before my period. Additionally, I experienced some weight gain and bad acne. I was glad to be on a non-hormonal method of contraception, as it gave me a better understanding of my natural cycle. This ultimately helped me receive diagnoses for both PMDD and endometriosis, so the copper coil was helpful in that regard. However, during the last five months of using it, I developed persistent thrush. I have since switched back to the combined pill, as the side effects from the pill are less severe than those I experienced with the coil.

The insertion wasn’t as bad as i was expecting but still quite painful and i had cramps for the whole day however was fine the next day. I struggled with a lot of back pain with the weeks following the doctors said could be sign of my body either rejecting it or getting used to it but it did get better with time. My moods are overall a lot better, on the pill i felt quite numb compared to what i feel now, i never had periods on the pill so i get quite down and irritated on them as everyone does but overall it’s nice to experience a range of emotions of a cycle. My sex drive has also increased a lot. I noticed i gained some weight on it and my breast have gotten a lot bigger and i do get very bloated for most of my cycle. My periods didn’t get heavier but i do get very painful cramps on them and while i ovulate. As i have only been on it for 4 months I’m still trying to keep an open mind to see if this settles down by the 6 month mark otherwise I may consider removal but overall i definitely prefer having non hormonal birth control