Cervical Mucus?

Nicola • Married. 29 years old. Mmc at 11 weeks July 2015 and mc at 4+3 weeks Nov 2015. Pregnant with baby girl due 30.07.17 ♡♡
I got a positive opk on Monday but have had no ewcm since then...is this normal? I seem to get a fair amount of ewcm normally but haven't had any for the last few months...feeling concerned as trying to conceive first baby xxx