The hormonal changes that happen in this period lead to fluid retention, weight gain, and effect on muscles of throat...this is the cause of snoring in period after delivery.
It stays 6-8 months post-partum.
If it is disturbing your sleeping pattern, repeated waking-up, daytime-sleepiness, then you must get Sleep-study to know if it is leading to Obstructive-Sleep-Apnoea.
Next Steps
1)Get Sleep-Study done to know level of obstruction it is causing.
2)ENT check-up for any other Obstructive disease.
Health Tips
1)Sleep on Side.
2)Weight-loss exercise and Diet.