Joint pain?

✨Izzi✨ • in a relationship // plan to be child free.
Every time I'm due on, I get really bad joint pain in my knees! No matter what I do it's so painful!! I try to have long baths to take some of the strain of them but it only lasts as long as I'm in the water.
Does anyone else experience anything similar? If so, got any secrets to beat it??