Pregnancy or irregular periods problem.

Hi doc my gf has irregular periods her last period came in December so we meet a gyno on 24 April after check up we came to know she has Polysetic overian morphology for that gyno prescribed crina ncr for 5 days and Pinkeva after that so on completion of crina she got har period on 2 may and it lasts on 5 may after that she started taking pinkeva from 8 may onwards during that we came close on 12 may we were naked rubbed against each other but neither ejuculated nor penetrated she is still virgin after that she forgot to take pill on 18 may so she took 2 pills on 19 may again she forgot to take it on 24 may so again took 2 pill on 25 may her pills lasts on 28 may now from 3 june evening she had spoting and from 4 june she starts bleeding and till 6 june she had bleeding during this period she used 11-12 pads but she had sometimes nausea and fever and having severe cramps and weaknesses also so she did beta hcg tets and result 0.59miu/ml now she has lite discharge from last 2 days why ?