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I'm currently 8 days late on my period, and I've taken 3 tests, all which have been negative. My period has always been between 28-29 days. My husband and I have been trying to get pregnant for the last 2 months. I'm wondering if anyone knows if surgery can cause your cycle to get messed up. I had surgery on May 8th. I've had 2 periods since then that were around the 28th-31st day. I want to be pregnant but at this point, I just want to know what's going on. If I'm not, fine, I just want to get my period and move on. Any comments???