Symptoms include irregular periods (earlier than the normal 28 days apart); periods that are heavier than usual; and periods that involve spotting rather than a regular flow.

现象有不规律的经期（比正常 的28 天周期要早），经期比平时的重，经期伴随着点块，而不是有规律的流体。

youdao

Short, steady practice is much better for learning than long periods on an irregular basis.

短时刻安稳的学习要比长时刻可是不规律的学习好得多。

youdao

Short, steady practice is much better for learning than long periods on an irregular basis.

短时间稳定的学习要比长时间但是不规律的学习好得多。

youdao

These include fibroids or "lumps" in the uterus, cancer, and heavy or irregular periods.

BBC: NEWS | UK | Camilla set to have hysterectomy

As you mentioned, all of these issues--acne, stopping the pill and irregular periods -- may certainly be related.

CNN: Could stopping the pill be causing my acne?

Endocrine disorders like thyroid disease can cause irregular periods, too, as can polycystic ovary disease, a hormonal glitch that may lead to obesity, acne, and excessive hair growth.

CNN: Your period: What's normal, what's not, what to do