Question about period and maybe be pregnant??

ok me and me dh have been trying to concive since nov of last year. nothing so i had to have a leep done for pre cancers cells and i did in april. after the i was having my periods like clock work on the 30 of every month give a day or two. my last period was on may 27th. i went and brought a at home kit to test to see when i am fertial. and around the 9th i got a postive. and me and dh had sex that mornining. but the next morniging i started spotting. very light sometime i had to wear a panty liner but it would last for hours. this went on for four days. sometimes it was brown and sometime it was pink a couple of time there was two drops of dark red blood but only on tolette paper. now that is gone i feel nausea, i am going to the bathroom more often and getting bad acid reflex in the back of my mouth. my period is due on june 24 this month by a charting at mymonthlycycles.com.. so does anyone have any sugguestion on what this could be??