MISSED PERIOD 2 months

Laquisha

I’ve missed my period for 2 months but I had sex and after I had sex couple days later I had little blood discharge figured it’s a rip or something didn’t really think nothing of it but now 😭 I’m cramping all the time and back aches what can I do to start my period could my period be trying to start ?? 😭😭😭 * yes I took multiple test all negative .