My Husband Has Recently Tried Stimulating My G Spot. Feels

My husband has recently tried stimulating my g spot. Feels great and he loves it. But every time he does it I start my "period" 8 to 12 hrs later. This happens every time, even if I have stopped menses only 5 days prior. I have looked for other causes like stress and it is definitely the stimulation. I am 38 and early onset menopause runs in my family. My period has been regular for about 6 yrs until now. I have an appointment scheduled but find it impossible to bring up face to face. Any suggestions? Also, I am unsure how to access your answer. Happy to pay a fee of that's what's needed. Please explain the process via email. Thank you