My last Imp is aug 6 I did intercourse on aug28 some times I have irregular and regular periods sep 2 to 5 i got vomiting loose motion and nausea and short breathness while walking small distance then I taken deviry tablet to induce periods from sep 5 to sep 9 i got periods on sep 11 to 14 but I noticed it's light periods i changed one two pad but not full sometimes I will got like this and periods colour red and lastly it changed to merun colour and flow from light to medium again medium to low and  I dont know whether it is pregnancy or periods shall I do beta hcg test to conform now?? Or what test I need to do and when I want to ?? please help me doctor I am so confused