Missed period but still ovulating 🤔

An

My last cycle was January 7th. I had my second <a href="https://glowing.com/glow-fertility-program">IUI</a> on January 16th and never started my period. I took multiple hpt’s and all were negative, my beta bloodwork showed negative, finally insisted on going back in to see my RE for an US and bloodwork to make sure that everything looked “normal”. My lining was thick but not abnormally so, my right ovary had two follicles, an 8mm and a 28mm 😳. Per my bloodwork the follicle was hormonally active so I was given a trigger shot to do at 10pm and BD for the next few days and not doing an <a href="https://glowing.com/glow-fertility-program">IUI</a> this month. Has this happened to anyone and you still got pregnant??? I’ve never missed a period and not been pregnant before. It worries me that this could be a water month. Looking for a sliver over hope 🤷🏻‍♀️