some advice on ovulation please

Lauren
Hi ladies, so glow showed my peak day march 13, and my opks were dark the 13th and 14th.. Then they started to get lighter, so I figured I ovulated and that was that. Well I had a few more strips that were not going to last, so I kept doing them every morning just to see. This morning I got a very quick positive opk., the others I definitely had to wait longer to see.​ I don't get it, did I not ovulate on the 13? Anyone have any experience similar? We are going to bd anyway just to be sure, but we have been every other day since the 5th when AF left. Any advice would be  great! Thank you! This is today's test, no mistaking that, right?