Sharp pain in Vagina and cramps when standing for few seconds - minutes

Hello! I’m on 9 weeks (first trimester). I feel that whenever I am standing or walking in our house for few seconds to minutes, I feel sharp pain on my vagina and cramps. It will go away after. I also have some watery discharge when I stand. Sometimes light brown. Doctor advise to take duphaston 4 times a day if this happens. Does some of you experience the same thing?#firstbaby #advicepls