Preg sympt, missed period, neg hCG but slightly elevated prolactin. Re-tested prolactin 2 days later and normal. Norm. Fsh, lh, estrogen. Why? Thanks!

Irregular periods . Irregular periods are one of the most common things obgyns treat and there are many options for menstrual cycle regulation. It sounds like all your hormone testing was normal so the next step is to discuss your options for cycle regulation with your doctor.
Anovulation. It sounds as if you've experienced an anovulatory cycle. These are cycles in which the ovary failes to release the egg. This disrupts normal hormonal levels.