I agree with MidwestBeast on the Iodine, and this is coming from someone who believes in, and has done, extra Iodine. First, get a baseline morning temp with a good Ovulation thermometer (Walmart). Then if below 97 upon waking, and not able to hit 98.6'ish mid-afternoon, consider supplemental Iodine. I'd start out out at an extra 1mg per week. This would be like double dosing a Multi, as 150mcg/Day = 1.05mg/Week... Try 2mg/Week. Monitor temps in the AM(97) and around 2PM (98.6'ish). I'd increase by 1mg weekly until I hit those numbers - it may take a while.
I prefer IOPlus tabs, as it contains co-factors like Selenium in the right amounts - I use a pill cutter to quarter them, and then cut those with a razor to get ~1mg chunks.
I believe we need more than the RDA because nothing contains Iodine anymore (Salt is about it and it's a crappy source, and most don't eat a lot of fish/seaweed) and we are assaulted by Bromine everywhere - but I'm not down with mega-dosing. Low and slow keeps you out of trouble.