The CM should begin to dry up just after O. Any CM if present can keep sperm alive 3-7 days to await ovulation and the egg can live up to a day, so assume you may be fertile the whole 9 days of having CM (without temps, I'd guess that's 7-8 days leading up to O and 1-2 following).
The scale and progression of fertile CM, from least to most, is usually:
none->sticky (thick glue-ish)->creamy (lotion-ish)->watery->egg white (slippery/gooey/stretchy)
Then regresses back to nothing in a day give or take after ovulation, but the pattern can vary greatly. Mine actually doesn't go to ewcm so much as being copious watery CM around O. I suppose nursing could alter hormone levels causing ambiguous signs, didn't for me though.
To give you warning for AF, most women have a very fixed timeframe from O to AF, somewhere between 10-16 days but reliable give or take one day for each individual. Count from when you likely O'd to when AF comes and you'll know how long that luteal phase should be every cycle.
This is assuming you are ovulating of course, For the first few you could be having anovulatory ones which are very confusing.