Hi Carolina!

Sorry AF got you - better luck next month.

As for your questions:

* you should continue taking folic acid - the experts actually recommend taking it up to a couple of months before ttc and after falling pregnant.
* OPKs - there are loads of places you can get them - you can get really cheap ones on the internet. I like Clearblue Digital, they are really expensive, but extremely clear.
* how many you need will depend on how regular your cycle is. On the packet it should ask you how long your cycle normally is and then give you a date from when to test from i.e. a regular cycle of 28 days will mean a probable ovulation on day 14 (therefore, you should start testing from day 12). For a regular cycle, you should only need around 7 max. For an irregular cycle, you could need a couple of packs.

Best of luck getting that BFP!