Symptoms? _DID YOU HAVE THIS?

My period came on normally which start on 19th or 20th, but before my cycle even started my boyfriend and I had sex couple time and he did not pull out any of those times. So now that I'm off my period days after I feel out if it I can barely eat I kind of force my self because everytime I smell or mostly put food to my mouth I feel like throwing up... But want sweets all the time, that's weird to me.. I have had headaches too days in the row.. Just weird I know you still can have period and be pregnant.. Has anyone gone thru this? Ugh I just feel sick a little laying down haven't ate yet just woke up and already feel like I have to gag. If you experience this let me know!!? 😫