Positive OPK but no CM

Kirsty

So I’m on CD 16 of month 1 TTC and I got a positive OPK today but had ZERO cm.

Maybe a little watery but no ewcm.

I got Mirena out around thanksgiving so maybe it’s hormonal?

I’ve tested negative for infections.

I’ve used pre seed the last couple nights and will tonight but I’m already feeling discouraged.

Will I not conceive until the CM comes back?