Backache does not necessarily mean that ovulation has arrived. Although backache is a symptom that some people may experience during ovulation, it does not mean that this is ovulation.

Ovulation, on the other hand, usually refers to the period of time when a woman is ovulating, usually around 14 days before her next period. At this time, the woman's vagina releases clear and sticky eggs, which usually have a slightly sour smell when they are discharged from the body.

So while backache may be one of the symptoms that occurs during ovulation, it doesn't mean that it is ovulation itself. If you suspect that your backache is caused by another problem, it is recommended that you consult a doctor for a detailed examination.

Additionally, if you want to determine when you are ovulating, you can do this by:

1. Measure your basal body temperature: You can measure your basal body temperature every day and record it in the table. During ovulation, basal body temperature usually rises by 0.3-0.5 degrees Celsius.

2. Observe the menstrual cycle: If your menstrual cycle is 28 days, you can start observing symptoms on the 14th day of the cycle and again after the cycle ends.

3. Observe sexual desire: During ovulation, women’s sexual desire usually increases, which may also be one of the reasons for your backache.

To summarize, backache does not necessarily mean you are ovulating. If you suspect that your backache is caused by another problem, it is recommended that you consult a doctor for a detailed examination. If you want to determine your ovulation period, you can do it by measuring your basal body temperature, observing your menstrual cycle, and observing your sexual desire.