What use think this CM is normal? Well here's a wee insite..

Ovia predicted my fertile period for this month 8-13th but we only had sex on the 11th, predicted period for this month on ovia is 18th and for glow the 21st (been using ovia longer)! Anyway the start to the middle of last week I had stretchy CM

Then on Friday I had a big blob of CM

My periods late according to ovia but still got 3days according to glow. No signs of it coming soon.. What CM do you think this is? Normal before a period?