His sperm or my reproductive system???

My SO has a 20 month old son from a past relationship, we have struggled conceiving. I'm getting a dye test of my tubes, I hyper ovulate when I take clomid but we have done multiple rounds of clomid with no success. Hubby is getting his sperm tested soon. He's taken steroids before and after conceiving his son... (Please keep negative comments about the steroids to yourself)... could it still be me or could the steroids of ruined him? He did A LOT more before his son and still conceived him and did much less after. Or am I still the problem?? 

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