Can nausea (no dizziness) only when standing be related to a menstrual cycle?

Possible?: Menstrual blood loss can readily cause orthostatis, i.e. dizziness upon standing due to blood loss and lowered blood pressure. What you're describing could be a variant, especially if you're taking an SSRI (excess serotonin can cause nausea). If this persists or is a regularity, see your pcp.

Nausea & Menstratio: Nausea can be associated with a men steal cycle usually when the pain is fairly great from the cramping. Try 600 to 800 Motrin if the cramps are bad. Use it every 8 hours till the cramping resolves and drink a lot of water. Nausea can also be associate with dehydration.