Hey everyone! I need some advice on my ovulation results. I feel like this might be obvious but just looking for a second opinion. Normally I ovulate between cd17-19 but this cycle I ovulated on cd13. Is that normal? Usually I just track ovulation with opks this cycle I also started tracking my bbt. When I saw my temperature spike on cd13 and then getting a positive ovulation test it caught me off guard being early. Is it normal for ovulation to be regular for multiple cycles then all of a sudden be early?