I have a strong cold? What do I do?

Not antibiotics. Rest and lots of fluids. There are no antibiotics that will do anything, since he common cold is caused bt a virus. Ibuprophen and over the counter cold meds help some people, but make sure you read the instructions and warning labels very carefully. I personally use sterile saline washes in my nose to help. If your symptoms get markedly worse, or don't improve in about a week, see your doctor.
Common cold. Tips: sore throat – gargle with warm salt water (1/2 tsp salt in 8 oz of water). Get strep test/culture if very sore. Congestion – saline nose drops or netti pot. For anti-inflammatory effect & mobilizing mucus- homemade chicken noodle soup. Hydrate- lots of water/clear broth/ add honey & a small amt. Of lemon juice to chamomile tea. Fever/ pain – Acetaminophen / nsaid’s rest!