18dpo faint line & Opk+?

Jess

My opks have been positive since the 7th 🙃 glow says I ovulated the 31 of December. Today I tested again and I got a line, but I’m not too sure about it. My last pregnancy I miscarried at 8 weeksish in November & my lines were never darker than this. Has anybody experienced getting a positive or anything at 18dpo?