Just thought I'd mention that the experts recommend you only DTD every second day when TTCing, due to the time it takes for sperm to regenerate. If you do it every day you are not giving the sperm enough time to get to peak and you could have an inferior batch swimming it's way on up to your egg on ovulation day.

Other than sniffing it, I can't suggest anything else to tell the difference.

My CM is way different to how it was before years on the pill. I very rarely got any EWCM snce coming off it. For this pregnancy I saw just one glob of EWCM immediately before DTD and hey presto I got pregnant as I O'd the next day. I had a temp dip on 6 & 7 DPO and I just new that small amount of EWCM did the job.... and I was right. I wasn't actively trying at the time of conception, was just being a bit daring and had given up all my TTC rules like avoiding coffee (in fact was drinking it by the bucket load as was hugely stressed at the time) and lying in bed for ages after BDing, had stopped taking Vitex for a couple of months, you name it everything was against me, but it still happened.

If you are having trouble with getting enough EWCM you can try taking evening primrose oil - I took 3 times the recommended daily dosage and got EWCM on the first month I tried it and fell pregnant on that cycle but miscarried, don't think it had anything to do with the EPO though.