Question: After being on the pill for only 10 days

Ashley • Expecting my first Rainbow miracle ❤️🌈Two babies in heaven👶🏽👶🏽•Wife💍•NY🗽

So my doctor put me on the pill to thin out my lining so he can do a SHG exam. I only took them for 10 days he said my period should start again in 4 days and he was right but this does not feel or look like my period at all mine is usually a dark red to really bright red. This more of a brown rusty color and its light so I’m confused to what this is and right when i got off the pill my husband have been very Sexually active, I don’t know the pill must of disrupted my hormones have ant of you ever had this problem with being on the pill for a few days and bleeding a couple days later?