Welcome and thanks for your question , this type of symptoms specially the warm fluid like sensation could be caused by several conditions from : peripheral neuropathy ( in which the peripheral leg nerve is swollen or inflamed) , lower back intervertebral disc herniation , diabetes ( high glucose blood levels),infections, vitamin B deficiency or irregular hormone blood levels specially with the thyroid hormone.
The main problem here is that more serious conditions could also produce this type of symptoms from blood clots and deep vein thrombosis , conditions that must be managed immediately to avoid developing serious complications and the only way to determine if there is a blood clot is performing an ultrasound .
Like you do not have health insurance , what you could do is going to an HRSA health center , they help people who do not have insurance and you will pay only what you can afford nothing else . But you need to be evaluated specially if taking aspirin has not alleviated your symptoms.
Here is the link so you can find an HRSA health center in your area :
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