 [ Symptoms ] how long do symptoms last with antibiotics for strep  i have tested positive for strep and was given a higher does of antibiotics because i was already taken them for a sinus infection my throat is still killing me i am on day 3 of 2000 mg of antibiotics how long should the symptoms last [ Disease ] sex is really good anytime but in the later third trimester you may need to modify your usual activity and be more creative your ob can should be the one that gives you the yah or nah at this point