i had protected sex on the 16 of this month. three days later i got my period. it was normal ? but yet again i have irregular periods. days later after my period i began having cramps and a bit of back pain. i’m also nauseous. can the nausea come from my anxiety? because right now i cannot control my nerves i’m freaking out because i’m sure i’m pregnant. i also suffered from ovarian cyst. could the cysts have come back? is that why i’m feeling this pain. or am i really pregnant ??? please help me i’m so scared i cannot sleep well or concentrate.