feel the need to pee but no pee

AG
 I am able to pee at regular intervals and it smells sweet. But in the interval time, I constantly feel tingling sensation in the vagina just like I am about to get period or discharge. Is this normal in any way? I am 20+3 today. Any pointers appreciated! Can't get to doc's phone till Monday and I am little worried if I have to go to ER for this 😩 

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