Hello, I haven't had sex since July so I don't think I'm pregnant. However my first period was 2 days late, ridiculously heavy and at one point I threw up due to the heavy cramps, but my second period and so forth since I had sex have been early by 3-7 days and are 1 day shorter and are a little lighter flow then normal and I'm getting little to no cramps. Is that anything to worry about? Also I took three tests all negative within the span of three months. Please return to me ASAP! Thank you.