I suggest to try to buy the BBT thermometer either sa drug store or sa OB mo mismo. Take note, that you need to get the BBT thermometer and not just the regular/normal one dahil BBT is more precise (e.g. normal thermometer will just say 36.4 whereas BBT will say 36.48). You need the precision kasi you have to track the changes on a day to day basis and see the pattern. I suggest that you go onto fertilityfriend.com and use that to record your temperatures (or baka may app available din na libre) and you will see it in a graph - mas madaling intindihin. With Fertility friend, after a few cycles, it will be able to give you an average of your cycle length, ovulation phase, luteal phase, and it will even tell you when you should expect your period to come. It will also predict when the ovulation will take place - pero of course, you need to keep on recording the temperature para ma confirm and ma monitor kung tugma ba ang calculation vs. actual. After a few cycles, mas nagiging accurate ang calculation and prediction ng ovulation and menses dates so you generally have an idea when to "time" things.
Aside from this, I URGE you to buy the ClearBlue fertility monitor. It's a bit expensive and you have to keep on buying the refill sticks every time you run out (every month you probably need to use 10). You use one stick in the morning, sa akin the monitor asked me to start testing by CD8 and eventually dahil the monitor is able to "learn" and "register" my cycles, I would get my peak by CD14, after that, hindi ko na kailangang gumamit pa ng extra sticks. But as the monitor is getting to know you, it will ask you to test early and then minsan sa simula, hindi niya madetect kung kelan ang "Peak". Anyway, the monitor is supposed to tell you, based on the amount of hormones in your urine if you are close to ovulating ("High") or ovulating ("Peak"). Then you time your BD'ing.
So in the end, I recorded my BBT and the results of the fertility monitor stick every morning on the Fertility Friend website. After a few months, I could already see the pattern and it really helps a lot in terms of timing the BD, to managing my emotions/expectations during the two week wait. Kumbaga, kung alam ko kung kailan ako nag ovulate at na-timing ko yung BD, mas malakas ang loob ko during the TWW.
Another reason why I liked doing the your BBT and ovulation tests, is that na-schedule ko ang pag-inom ng grapefruit juice at acupuncture. May mga times kasi na ideal for acupuncture (according to my chinese med doctor). At syempre the grapefruit juice really helps with the CM.
Anyway, mabalik tayo sa fertility monitor. I suggest you get the fertility MONITOR and not the disposable tests. In the long run I think mas nakamura ako than if I got the digital ovulation test. Feeling ko din, mas accurate dahil it tells me clearly kung "Low" "High" or "Peak". Some of the other digital ovulation tests are a bit confusing sa result - may iba just shows you just "smiley" faces for a few days eh minsan imposible talaga to BD 5 days in a row.
The fertility monitor plus a box of sticks cost me about SGD$200 (pinabili ko). Then subsequent boxes of the refills are $50, each box contains about 20 sticks. Siguro kung may relatives kayo sa US or UK mas mura doon.
Sorry, napahaba ulit.