Can a hysteroscopy or biopsy trigger a period?

Ne

Ok—I am so confused.

Last period was June 14th. I took Femara on days 3-7, no ovulation.

Then, I had a hysteroscopy and biopsy on July 8th—-which was later in my cycle. After that I had bleeding somewhat like a period for about 4 days.

Yesterday I got a positive OPK. I’m in shock. I was thinking it was CD 37, but then I wonder if my body counted that bleeding post procedure as a period? Thai would actually make ovulation in CD 14.

I didn’t take Femara during those bleeding days. Could it still be helping me?

Thanks in advance for any answers. 🙏