hello ladies. question for you all.

for about two days now I have felt the urge to urinate wayyy more often than I normally do and most of the time not very much urine comes out. I've also had more of those pinching sharp feelings inside the vagina. I also have had somewhat of the "runs" since yesterday but the day before that I had perfectly fine bowel movements. I saw my doctor on Thursday and he said I was closed. I'm only 35 weeks 3 days so I'm kinda hoping this isn't the start of labor. have any of you ladies experienced this?