Can 3rd month period be late after ecp.

I have taken ecp after oral sex on 28th of jan due to possibility that some precum might be there this sexual encounter occur on 26th of jan my period date for jan was on 8th jan after taking about 12 days later i got bleeding on expected date with heavy flow and it lasted for 4 to 5 days this occur on 9th of feb and after this on march 5th i took upt which came out negative , this upt was taken about 5 week later from ingesting ecp and after that i got my bleeding in moth of march also again it lasted for 4 to 5 days with good flow this occur on 12th march . Period on jan 8th Period on feb 9th Period on march 12th 1)So my question is pregnancy is ruled out?? 2)The bleeding that occur in month of feb and march was that my period? 3)Will april period come on time or not?