I have had similar stuff as well. I have considered mine EWCM, because it does stretch...a lot. Usually, I notice semen to be more wet and slippery (IMO) and not stretchy. It could be a mix of both, but since it stretches SO much I think its EWCM. I have tried to pay attnetion to the tp, but I get caught up in observing whats on my finger and forget to do the tp thing.

When it doubt, mark it as fertile CM.