Emergency c-section... No periods for 5 months (was breastfeeding) then 37 days cycle for the past 6 months. .. Am I ovulating? First pregnancy ivf

Very probably so. You are probably ovulating but at a less frequent or regular fashion. See your gynecologist for testing and management. An over the counter ovulation predictor test can answer your question but does not explain your oligomenorrhea. Thyroid dysfunction must be ruled out asap!