Maybe it isn't so much what to do to be patient, but what not to do to be impatient.
If you are having problems communicating, and things are bottling up to the point where you are about to explode, then you need to work on better communication in your relationship. We all have a need to be listened to, and not fluffed off, or taken for granted, or have our concerns dismissed.
When we are not heard, frustration and anger takes over, and everything is more difficult when that happens.
Try, instead of getting worked up about unresolved issues, to come to some sort of agreement with your partner, to just talk, even if it is at the end of a busy week. A quiet place, just the two of you, just to talk about your week, or anything that is bothering you. Just because one of you wants to talk now, does not equate to the partner being fully available emotionally or otherwise, to deal with relationship issues. Agree, above anything else, to make time, for each other, just for that purpose- to talk.
For some people, patience is an art that needs to be mastered, and that takes time and effort. If your lady is already feeling pressure, and needing time, space, and patience from you as you said, then she is not likely in a good place to discuss problems with you. Learn to temper your needs, with a healthy attitude and a plan to have your needs met in a more condusive and productive way.
If you are both committed to each other, learn to find ways of communicating that are mutually workable. If you can get the communication down pat in a productive way, that doesn't overwhelm your partner, or your partner you, I would say that is the key to success.