Yes Hi Doctor. My Period Is Irregular So I Haven't

Yes hi doctor.
My period is irregular so I haven't got my period since April 4th that was my last period. However I did start spotting about two weeks I spot a day or two for a few hours and stop another day I don't and then again I spot very little (discharge is pink/brown). I don't use any birth control and I have had unprotected sex. Do you think I can get pregnant or is it safe to have sex while spotting or even if I'm not spotting and I spotted the day before is it okay to have sex?

Thank you,

Karla