Do not worry about a panic attack and skip the dose and take tomorrow for sure. My suggestion for you is get a pill container that has the days labeled on them and put each dose in each day so you will know, also keep a journal of daily activities to see what might trigger an event more since taking medication and know correct dosage too, some take 50mg,100mg and up to 200mg a day. Zoloft has a longer half life with active metabolites that convert over in the liver to make the meds actually stronger but if you go too long then you will certainly experience SSRi withdrawal then it will be like starting over, so take next dose when you awaken and get a handy little pill container and you can buy them anywhere not just a drugstore, take care and best of luck. Call your physician or pharmacist if you experience any difficulty.
expereinced health care worker and certified pharm tech