Ok so im taking doxycycline and i took it around 9:30 but got nauseous and felt like i had to throw up. i threw up just a tiny bit but didnt see the pill should i be worried?

Whether your nausea and vomiting is related to the doxycycline or what its treating, if it continues you should talk to your doctor about it and increase your fluid intake. Otherwise , just continue taking the doxycycline as scheduled without trying to make up for any loss. Avoid any dairy products (milk, cheese) within 2 hours of each dose as they will bind the doxy decreasing its effectiveness.