Have you tried charting your temp? This gives a definite indication of when you have ovulated ( but in retrospect only after ovulation, so can't use to time BD first cycle). It does help to pinpoint the the likely fertile period of your cycle though. fertility dot com is a good site to get you started.
Also are your periods regular? Average luteal phase (days from ovulation to menses) is usually 14 days. Get an average of your last 3-6 cycles and subtract 14 from it.
eg. average cycle length 30 days - 14 days = 16. So you are most likely to ovulate around day 16 of your cycle. Start BD daily or every 2nd day from day 11 and continue until you think you have ovulated (CM dries up). Although, if you are BD frequently, it's difficult to distinguish CM from semen
Good luck. I know TTC can be very confusing and often frustrating. You are showing good fertile signs though, so your journey should be very short. Hope to hear your good news very soon. for a for you.