5 mo ago had ab. First period on time so was second. Third was a week early and really bad. Fourth: was supposed to start on monday. Took preg test wed and was negative. That night starte but really light. Dont even need a liner. Its now thursday evening and its the same. Normally it would be heavier flow. I have usual cramping and pms symptoms. Befor wed i was sick like a flu. But fine now. I have been stressed alot lately and loss of appetite. Could i be preg again? Is this normal after an ab.? Any help or knowledge would be greatly appreciated