do you think I'm pregnant

if I was furtle a month ago and had had my period last week and also has sex a few times in between that do you think i could be pregnant ? I've been feeling sick in the mornings and the day but it's just started 2 days ago . I also have been really stressed could that be it ? and also could it be that I caught mono from my friend that has it ? just scared and need to know what you guys think !!