I Ovulated On The 1st Of August,was Sexually Active Before

I ovulated on the 1st of August,was sexually active before and after till the 4th august.I had another period again on the 17th of August but since d end of the period which lasted 5 days I hav been feeling pregnancy symptoms.On the 30th August I had a cramp, vomiting and diarrhoea ,so on the 2nd September I had a pregnancy serum test which came out equivocal.Am I pregnant? My next period is due in 5-6 days 11th or 12th September