If this is a toxin issue then the key treatment is to keep that lymphatic system pumping. This system is responsible for clearing out a lot of the toxins in your body and keeping everything well lubricated. It's not like the circulatory system however in that it doesn't come with a built in pump (like your heart). Instead it relies on muscle movements/contractions and overall body motion. Working out, stretching, walking, dancing even just getting massages will help keep this system in peak performance.
At 4 months though I guess it's possibly a matter of whether or not that you still have a lot of weight to lose and/or if you're keeping physically active enough. From the sound of it you're doing low carb or very low carb. If after 4 months you're still having difficulties with it try adding back in the occasional tuber or gourd. Have you been checked for vitamin levels? Some of those can take many many months to correct if they were off to begin with.
Remember though: there is no one perfect diet that fits everyone!
"You can demonstrate the purpose and limits of human digestion with a simple experiment: eat a steak with some whole corn kernels, and see what comes out the other end. It won’t be the steak."