Am i just sick or is it worse?

the other day i hadn't eaten too hearty then smoked marijuana and a little more than an hour later passed out and was told i was shaking. i never went to the doctor just figured it was because of what i did and lack of food. now i am sick with a cold, stuffy nose , cough, somewhat sore throat. however all my friends had a similar sickness like this a couple weeks ago and i kissed my boyfriend who had a slight cough. is it all interconnected or can it be somthing worse?