Implantation Cramping or Tingling: This is a common symptom experienced by some women during early pregnancy, typically around 6-12 days post-ovulation (DPO). The tingling sensation could be related to the implantation of the fertilized egg into the uterine lining, which can cause mild cramping or tingling sensations on one side, corresponding to the ovary that released the egg.

Mild Urinary Tract Infection (UTI): Although the question mentions "UTI-like" symptoms, a mild UTI could still be a possibility, especially if the tingling is accompanied by other urinary symptoms like frequency or urgency, even if not explicitly mentioned.
Ovulatory Pain (Mittelschmerz): This condition causes pain on one side of the lower abdomen during ovulation, which could be perceived as tingling. However, given that the symptoms have persisted beyond the typical duration of Mittelschmerz and have switched sides, this is less likely.
Hormonal Changes: Fluctuations in hormone levels during the menstrual cycle or early pregnancy can cause a variety of symptoms, including tingling sensations, due to changes in blood flow or nerve sensitivity.

Ectopic Pregnancy: Although rare and typically associated with more severe symptoms like significant abdominal pain and vaginal bleeding, an ectopic pregnancy must be considered, especially if there's a history of fertility issues, previous ectopic pregnancy, or if symptoms worsen.
Ovarian Cyst or Torsion: These conditions can cause sudden, severe pain and could potentially cause tingling sensations if there's nerve involvement. They are emergencies and require immediate medical attention.

Neurological Conditions: Certain neurological conditions, such as multiple sclerosis or peripheral neuropathy, can cause tingling sensations. However, these would typically be accompanied by other neurological symptoms and are less likely to be directly related to the menstrual cycle or early pregnancy.
Endometriosis: While endometriosis can cause cyclic pain, it's less commonly associated with tingling sensations on alternating sides in the absence of other symptoms like heavy bleeding or chronic pelvic pain.