I have a decreased urine output, but all tests are normal?

I am a 27 year old woman. I suffer very less urine since one month ago and feel something is pressing not to able to urinate very well and happens very slow drain in Urination. This happens very most to first time urination at every morning. Whole day urination is ok. I did check up IVU for kidney and USG . Urine test too. All are normal and No abnormal results are found. According to USG result, I have ovary cysts but it is not big. Just 2.6 cm. Let me know the answer please why I suffer this and what i need to check for.
Thanks advanced .

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