Help my understand how to TTC

For March my period was 3/11-3/16

My fertile window was 3/22-3/28

We did it 26. 27. 28

So we will see if that worked

BUT... if it doesn’t.

I just bought ovulation test strips

A Basal thermometer

And prenatal vitamins

Should i start the prenatal now?

Should i start my nasal temp tracking tomorrow??

Should i test my ovulation only after my next period for April or just start now even though I’m not ovulating??

So confused.

So much more goes into this than just BD