Muscle knots are usually caused by stress. Stress & tension later develops in the form of muscle tightness and discomfort called muscle spasms.
Regarding your slightly high lymphocyte count, if your doctors have reassured you that it is not a cause for concern, it's generally best to trust their expertise. Minor variations in blood cell counts can occur without indicating a serious health issue.

If your belly fe­els upset after taking me­dicine for leg pain, that's normal. Nausea and tire­dness can occur due to certain drugs. Whe­n you consume lunch and feel ill, your body re­acts to the medication. Ensure hydrating we­ll and eating smaller, lighter me­als until you feel better. 

Trauma can potentially trigger or exacerbate rheumatoid arthritis. By increasing inflammation or immune system response.

Thigh pain can be due to various reasons such as muscle strain, overuse, or even bad posture. Sometimes, you're sitting for too long, and you'll feel your thighs are hurting. Alongside this issue is that you are sitting for a long time and your thighs hurt. Do some light stretching, and apply heat to the affected area. Be active and avoid long periods of sitting down to allow them to feel well.

To stop arthritis from progressing, you need to avoid running, squatting, jumping, stairs, cross legged sitting. Do weight reduction and quadriceps and hamstring strengthening exercises.

Acupuncture helps in opening up the energy level ( commonly referred as 'Qi' in acupuncture theory).
Acupuncture needles are put on various parts of the body which helps in increasing the blood flow.
It has an anti inflammatory effect. It stops body's inflammatory response, increases blood flow and relaxes muscle tone. It helps in flushing out toxins from the body. Acupuncture releases endorphins which are natural hormones to reduce the feeling of pain and puts the patient in ultimate relaxed state i.e feeling of well being.
Electro acupuncture pulsates electric current through the needles.
Such procedure gives quick response and helps in reducing both pain and inflammation in people with arthritis.