 [ Symptoms ] my period is 4 5 days late and i am very lightly spotting could i be pregnant  i should of had my period start on 1014 and on the 16th i had very light blood that was barley red and then i put a tampon in and when i took it out there was no more and since then when i wipe once or twice i seen pinkish color but no actual blood we have been trying to conceive for quite sometime do you think this could mean i am pregnant or no [ Disease ] i am sorry to hear you are going through this it sounds very uncomfortable it is true that antibiotics continue working for some time after you take the last dose the length of time they keep working depends on the exact type of antibiotic however at five weeks post antibiotics you can rest assured they have long since exited your system and it is very good news that a chest x ray showed your lungs are clear of fluid as you probably know pneumonia is an infection of the lungs this is usually caused by a virus though it can also be caused by bacteria the problem with either type of pneumonia is that it inflames and irritates your delicate lung tissue and this irritation can linger even after the infection is gone this probably explains why you continue to feel symptoms even though you no longer have pneumonia per se i would suggest you continue to follow up regularly with the doctor who treated you he or she should be able to better explain the factors that may be continuing to cause you discomfort you deserve an explanation and your doctor is the person in the best position to tell you wishing you well