Jay-Bee, I used OPKs for a while and was able to see positive results that corresponded with my temp chart. However I've now had 2 cycles where I don't see a pos OPK, but my temp chart shows that I ovulated. Could have been faulty batches of tests, I don't know. So now I'm not too keen on using those any more.
The temp charts are accurate to show you if you ov'd, I just wish there was a way to accurately pin point ov before it happens (at home). Allow me a moment to quickly explain the process of events prior to ov.
- First estrogen raises, which can be detected by the saliva test that some people use, however there is no guarantee that the rest of the process will follow (in cases like PCOS, its possible to have more than 1 estrogen raise in a cycle and only the last 1 counts).
- Next the hormone called LH raises to prepare the body for the release of the egg. LH is secrated in your urine, which is what the OPKs try to detect (I'm just wondering, what if your body don't secrate enough LH through urine to trigger the test?). Once LH levels start to raise, it will be 36 hours until ovulation. Problem with OPK testing is that you don't know exactly where you are in the 36 hours, so general rule of thumb is to expect ovulation within 12 - 36 hours after seeing the first positive OPK.
- Once the egg is released, your BBT raises (basal body temp, e.g. temp when you first wake up) due to a progestrone raise. Fertilisation of the egg needs to happen within 24 hours after being released, or you've missed the boat (keeping in mind that sperm has a longer life time, so BD from 2 - 3 days before could also still have an impact). Progestrone will stay high throughout your pregnancy if its BFP, or drop a day or 2 before AF arrives.
I'll attach a nice image I found to show you how the different hormones operate in relation to temp readings. It really helped me a lot to understand what is happening and not get myself in knot each time something unexpected happens. Knowledge helps you stay sane.
@Lillyr, so the above in part answers your question re timing of BD and the pang you felt this morning. Its definitely possible that ov was earlier and you'll have 24 hours max afterwards to BD (the earlier the better, so make this evening count

). However its also possible that the pang was something else (I get similar pangs from my colon around ov time due to estrogen having an impact on my IBS issue). If you did temping, you'd know over the course of the next 2 - 3 days if your temp is elevated and that would confirm it. Seeing that you don't have any data to go on yet, I'd say just BD every 2nd day until after the day you normally ov, starting tonight. That way I'm sure you stand a good chance this cycle.
As for your question on birth month, I'm with Morgan on that one. The longer it takes to get a BFP, the less you care about which month of the year. At first I never wanted my kids to have their birthdays in the same month, but now I feel that if it happens that way, then we'll just make the most of it and have one massive party every year.
And re gender "selection", apparently if you BD very close to OV, its more likely to have a boy because male sperm swims faster, however if you BD'd the day before OV, the female sperm had time to also catch up and the male sperm have deteriorated in quality already, making it more likely to have a girl. Honestly, I don't know if it works that way and I'm in no posision to be picky, so I won't be trying it.
@Beehen, wrt taking your temperature in Fahrenheit, it doesn't matter if its F or C, as long as you keep on using the same unit of measure.
My apologies for writing yet another essay.

Its what happens when you're sitting around at home, recovering from a lap, and not having anything fun to do (you can only watch so much TV in one day). If it helps to reduce the TTC stress for even 1 lady, then I'd be very happy.