I have also had problems with my left side. Weakness, buzzing/vibrating like sensations, swelling ect. I only had the IUD for 10 days because it just didnt work for me. My husband and I decided that going back to good old Condoms was the best for us. We only use them during and around ovulation time. It works great for us. I will never put artificial hormones in my body again. Good luck to you.