Trying again at 38

So...I have a 13 year old and a 9 year old. Both were conceived with non science and my first was an accident while I was on the pill.  After a divorce and a remarriage I am trying again and going about it way more scientifically. I'm loving this app as it distracts me from all of the waiting. I went off of the pill on 12/22 and had my first period on 1/18 so this is the real cycle of trying. I'm kind if guessing as I don't know how long my cycle is.  I took my first ovulation test today and it said no but the app says I should be any day...just wanted to say I enjoy reading the posts and not feeling alone out here :)