Are these medications making me sick?

well I''ve had a fever for the past 3 days, and today its gone down a lot, but last night i took 2 nyquil liquid gels, and this morning i felt so horrible, i felt like i was going to pass out and i had really bad diarrhea for about half an hour then i was fine, and . i have a really sore throat, and today my doctor gave me apo-cefprozil, and i took one today and then a few hours later i had diarrhea again. is this from maybe taking two liquid gels? i've never taken them before so i though 2 would be good, but im not sure if i just made myself sicker.