seconding @beta1042 - OP, i recommend you find a time to go on hiatus and develop a nice big buffer. its honestly such a lifesaver.
also, schedule in little hiatuses - no more than a month - at the end of every chapter / part / however you divide it up. its really important you dont burn yourself out, and if you end your chapters on cliffhangers (you should, tbh) then the little wait will make your return that much sweeter for the audience. lots of little hiatuses are so much better than one long hiatus, for you and your audience.
also, try working in batches when producing your pages. where you may be able to produce a complete page in a day, you could probably produce five pages in two days if you did five lots of pencils, then five lots of inks, five lots of colour - working on 5 pages at a time can seem daunting, you can start at two and build up to a place where you feel comfortable (five is just my number of choice, you could do more or less, it depends on your style, speed, and computer). this method means less switching tasks, and makes everything just so much more efficient.
and if you do end up making five pages a week, well, do not post five pages a week. i make five, post two - im always building my buffer, and i can miss a week with no consequences.