Missed period for 4 months

I got my iud taken out in January of this year, I had a regular period the following week. Then I didn't have a real period again until July. I spotted in August for about a week, and since then nothing. The last pregnancy test I took was in October and it was a BFN. I've been actively TTC for almost 9 months now, I'm so discouraged and sad. Did anyone else experience this problem after having their IUD removed?