C.A.
The biggest problem that I see is leaving the dog unsupervised. You can't do it and you can't correct the dog once he/she has already done the deed. That dog has to be by your side at ALL times with you watching it. If you need to get some things accomplished then the best option is to crate him/her. You don't say how old the puppy is but puppies usually need to be taken out every 30 minutes. Especially after they eat or drink.
The way I trained my Dalmatian was to have him by my side at all times. Hook a leash to your waist or whatever is most comfortable so that the puppy only has a certain perimeter and you can keep an eye on him/her at ALL times. If he/she begins to poop or pee you already have them hooked to the leash and you gently tug on the leash attached to their collar telling them NO! No! No! I always added You go poop/pee pee outside! You say this to them the entire time while getting them to the specified door to go outside. Once they "go" outside be sure to praise that behavior~ also make sure you are taking the dog outside the same exact door each and everytime. If you are using multiple doors-it can be confusing. Writing out a schedule can be helpful for you as well so that you understand and know what your Dog's routine is-eventually the dog's routine can get on your level but its going to be awhile before that happens. Oops I just saw the age-yeah she is still just a baby so that control isn't there yet because everything is still so small! Take her out every 30-45 minutes and keep her leashed up to you at all times and watching her like a hawk! You are giving her free range of your home-she hasn't earned that right yet. If you can't have her tied up to you because you need to get something accomplished and cannot watch her then you need to crate her. I would suggest doing it now rather than later. If you need advice on how to crate train her just PM me or look online there are some really great forums on that and its not mean.....dogs in the wild run in packs and will have a "den". Have you ever noticed with a dog that hasn't been crate trained usually has a certain "spot" like under a certain table or under a certain bed, etc......they have created their "den". Their sanctuary, their "home". so its not cruel or mean to crate them-the biggest thing is to make it a positive thing for her-not as a punishment. Also by you attaching the dog to you and follow you around will create a bond and will show the dog who really is the alpha male of the pack-which is you. Good Luck but be patient-she will get it! Being consistant is the key here as well as direct supervision at ALL times-it won't always have to be that way just for right now. This too shall pass.....