4 days late, 11 dpo, 2 negatives... help!

So I always start on day 27 in the mornings but I'm 4 days late. I think I ovulated late this month around day 19 which would make me approx 11 dpo. I've had 2 negatives and on both I thought I might have seen a faint line but my eyes can play tricks on me. Is it to early to test?