Letrozole/ prolonged cycle?

March 31st was my last day of taking the letrozole. I was able to BD that night and the morning of April 1st, but when my SO and I were done yesterday morning he noticed that I was bleeding heavily. I informed my care team that I had started what appeared to be a period. Only for them to say that its normal, and that due to the fertility medication I may be experiencing a longer cycle. My question is, has this happened to anyone else? If so were you still able to go for your progesterone test on cycle day 23 and you still ovulate? Or did you have to wait for the next cycle?