Is this the symptom of metrorrhagia?

Patient's question:

On the 12th, I had my period. It took about 20 days to completely clear. On the 21st, I had sex without any protection and immediately took emergency contraception (Danmei). Then, on the 28th, my period came early (my cycles had been around 30 days for the past three to four months). This time, it cleared on the 1st. Then, on the 3rd, I had sex again, but the condom's tip accidentally burst, and some sperm leaked out and stayed inside the vagina... Since I had taken emergency contraception less than two weeks ago, I didn’t take any medication. On April 14th, my period did indeed come again!! But the flow was extremely heavy—unlike usual, where it’s barely like this. From yesterday to today, for almost four or five hours, I had to change my sanitary pad completely soaked through! There was a thick red substance on it.
Previous treatment and effectiveness: Taken emergency contraception, experienced an early period once, then had an unexpected encounter.
Hello, is this a miscarriage?

Doctor's answer:

The fertile period is in the middle of two menstrual cycles. The middle period you had should be ovulation bleeding. Occasionally, it can be left untreated. If it happens again in the middle of next month, you must take medication. This time, your menstrual flow is heavy, so you can have an ultrasound check. You had your period on the 12th of last month and on the 14th of this month, which is basically a regular cycle. You can buy a pregnancy test to rule it out. Miscarriage and leukorrhea are not the same thing. First, check your physical condition.

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