calling my doctor

I'm 33 weeks and I've started spotting. I got nervous b/c it's never happened to me before. With my first child I didn't experience anything like that. I called my doctor and she just told me that I wasn't drinking enough water so that's why I was filling pressure and then asked if I had sex recently b/c that's why I was probably spotting. I drink water all day everyday and I haven't had sex for almost 2 months(don't ask 😒 lol). My doctor completely blew me off and made me feel like my concern wasn't important to her. They say call the doctor when you have a concern but I'm not to sure how true that is now. Has anyone else's doctor made them feel that way? Or is it just me!?!