Ruf- I'd reckon it's just your CM increasing.

If it were to be thrush you'd probably find it to be sort of yellow in colour, might have a slight smell too.

I got really string jelly like globs when i got to about thirty weeks, so i wouldn't be panicking.

Although (if you aren't already) wear a liner, JIC that way when you get hold of your OB you can take it in and show him/her.