Could be a spasming bowel, muscle or blood vessel. I get strange lower-right abdominal pain sometimes that is intermittant like that when the end of my small intestine (where it joins with the large intestine) is inflammed or irritated sometimes. It is believed in my case that the Lyme has inflammed my bowels, but this may not be your case. It would probably be a good idea to ask your LLMD about this just to be sure.
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently weaning off TPN.
Meds: Pulmicort, IV Doxycycline, Heparin (to flush PICC line), Claritin, Singulair, Domperidone, Colloidal Silver (topically & nasally), probiotics, Liver support herbs, Ailanthus, digestive enzymes, homeopathy.