Delay in periods. As early as possible.

I have been suffering from skin infections so dermatologist has suggested me to take " Doxybond-lb " for 15 days and a sunscreen to apply to my face. I'm consuming these tablets, it's been one and half weeks. I had also fallen sick mid of the month due to hyperacidity and fever. Had taken doctor suggested antibiotics and stomach pain relieving tablets, as I had vomiting and loose motions due to hyperacidity. Coming to the point, I had regular periods. But this month periods has been delayed. My periods used to happen regularly every month. This month it's already a week late. I want to know whether is it because of consumption of antibiotics and other tablets or any other reason. I'm worried as I'm feeling physically heavy and hands and legs pain. Please let me know about this as early as possible. Thank u.