Hello,
Thanks for writing to DoctorSpring.com with your health concern.

Can you specify what is ' it ' ?
I assume you are referring to Deviry ( progesterone preparation ).
As I understand, you wish to postpone your periods atleast till the 17th and 18th of February, and also want contraception ( is that right ? - do correct me if wrong ).
For postponement of your periods, please start taking Deviry immediately ( twice a day or thrice a day if you are overweight ) and continue it atleast till the 18th, once you stop , you would have a withdrawal bleed within a week.
For contraception, yes, if condoms are ruled out, then use the I pill.
The I pill would mess up the expected period date, and you wont know when you bleed next, but this is the best combination for the purpose intended.
If you are comfortable with condoms, then just Deviry will suffice.

Edit -
Rather than being harmful, if you wait for your periods to start before taking Deviry, you would be too late.
It is supposed to be started BEFORE you menstruate, if you wish to postpone menstruation.

All the best.
Please feel free to discuss further.

You can use Primolut - N.
It will work the same way as Deviry.
It is too late to start Ovral for contraceptive purposes, just one week or less of Ovral will not initiate contraceptive benefits.
Also, starting Ovral too late will not make it useful for postponing your periods also.
You should start Primolut - N right away, as you might start your period anytime, and once it starts, no drug will work to stop it in time.
Once you have your period after the use of Primolut - N and I pill, you can then start taking Ovral from the 1st or 2nd day of your period.
Take care

No it is not at all a proper dose.
You should take it at least twice a day.