I am 23 years old women my ovulation is on 16 I intercourse from 14 to 21 now a days I have fever at night and back pain is I am pregnant or when I can make a home test my period is on11 October

Calculating ovulation is not exact. You may have calculated that you ovulated on the 16th but it could be off a few days either way.

If your last period was October 11 then you would be due for the next one sometime this week. If your period doesn't come, you should wait about 2 more weeks to start testing.

And whatever symptoms you are feeling are not due to whether you are or aren't' pregnant. It is too early for any symptoms to manifest themselves.