Hi, Welcome to Health care magic forum.
Due to fever
for few days, there will be constitutional,changes in the body, and the period may be late for that reason. The other reason may be the new brand of pills which may take time to get accomodated.
If You are more particular, about it you can have home pregnancy
test, or H.C.G. test.
Take more of green leafy vegetables, pulses, sprouts,and
protein rich foods to have a good recovery and good health.
Wishing for a quick and complete recovery. Thank you.