The day after having sex, with condom, and just a week after I ended my period (so 15 days early and during ovulation) I started bleeding, not spotting but not as heavy as period for me, but would be normal flow for other women cause my periods are very heavy, bright red fresh flow, for 4 days, with horrible cramps, nausea, same, tender breasts...

I know I'm not pregnant so, was it my period and next one will be in 30 day or was is ovulation and period will be in 10 days?