It is common for urogenital infections to flare up during pregnancy
due to increased tissue vulnerability. You should have a checkup with your obstetrician to rule out vulval trichomonas or candida infections. Also your partner should be tested and treated if there is any infection. Urinary infections do not usually cause itching, it is the vaginal and vulval infections. Maintain personal hygiene and wash with lukewarm water every time you use the toilet preferably with a disinfectant. Wish you speedy recovery.