Not getting a positive ovulation test

Dawn

Hey ladies...i went off my pill in June, and tested a little in June and July, but had very weird periods and shorter than normal cycles. the one In July, i started spotting 7 days earlier than my predicted date (according to my days app), and then got my actual period 5 days early...so now, I've been taking ovulation tests all week, bc this is my projected ovulation week for both apps i use. today is THE day, I have had some discomfort the past 2 days, but I have yet to get a positive ovulation test. with my 2 boys, I was pregnant our first month trying...this is now month 3...and now I'm not getting a positive...any advice? has this happened to any of you? feeling discouraged and concerned...i should add, I had endometriosis for years before having my oldest son.