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The symptoms that you describe could be attributed to the new condom used or to injury/inflammation due to intercourse. If the symptoms persist or do not get controlled in 48-72 hours, you should consider visiting your doctor/gynecologist for further evaluation and assistance. Treatment as appropriate (based on examination findings and investigations results) would be started to help you control the symptoms. Avoid vaginal douching, use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle. If infective cause is detected, get your partner also treated simultaneously, and avoid having intercourse while being on treatment to prevent chances of re-infection.
Take care.