I stumbled onto Instead Softcups while researching issues I was having with tampons (heavy clotting, cramping, etc.) They worked out really well, but I wanted something more environmentally friendly and removal was messy. I purchased a large Diva Cup and thought I had found the ONE, but toward the end of my period, I was becoming ill, almost like I had the flu and was getting headaches. I was not feeling any pain. I thought it was a coincidence, but the next month was the same. I thought maybe I was having a reaction to the plastic, so I ordered a large and XL Meluna. I tried both the XL, which works with my flow perfectly and the large, which needs to be emptied often on my heavier days. I have had the same headaches and general malaise with both. I don't want to go back to Softcups full-time, but I don't have this problem with them. I don't know what to try next. I am 39, have never had children and tend to have a heavier flow. Any advice would be appreciated.