Filed itr2 instead of itr3 - ay2018-19

I have filed ITR2 for AY2018-19 & e-verified the same. Proccessing is yet to be completed by IT Dept. However I have missed to include the specualtive gain/loss, which has to be part of ITR-3. So can I file ITR-3 now. If so, do I need to mention the acknowledgement no. of my ITR2 in ITR3 & file it as revised. Please advise if anything more to do during filing. Thanks in advance.