BFP shock!

So I wasn't expecting a positive this month because DH was away while my opk was positive but much to my surprise it's positive! I'm 10dpo today and the cheap ones had a fairly not squinty line lol. I'm wondering if maybe I ovulated earlier? Im also worried about chemical because of reading so much during ttc. Here's a pic of the tests I took this morning, I need to get a digital!