Feeling blue

I don't know why, but I am feeling very emotional this morning. I have been on the verge of tears since I woke up and I really cannot figure out why! A few things come to mind:
1. I have not been able to get rid of the cold I got last weekend. I am still congested and don't feel 100%. It is wearing me down.
2. Due to #1, perhaps, I still feel worn out and tight from the weekend's training sessions. I felt great when I was doing them, but now I feel bad.
3. I am feeling like I cannot get on top of my chores/to-do list. Occasionally I get overwhelmed by my constant day-to-day responsibilities and begin to feel like a failure, like I am lazy or a procrastinator or just irresponsible. I hate it when I am making a million phone calls a day to get my yard cut, my dishwasher fixed, my address changed, my cable line buried. My realtor calls and needs something, my family calls and needs something, the school calls and needs money or time, my kids have projects due and need help with their homework, my house is dirty, I haven't put clothes away in 2 weeks, I still have half my furniture in my old house, my property manager can't get my house rented, my bike needs to go to the shop. Blah blah blah. I get down on myself and as hard as I try I cannot be a good friend to myself. I try to remember that I am a single mother to 4 children and that it is never going to be easy. I try to remember that most families have 2 people to handle all of these responsibilities. I'm just tired.
4. It takes a lot of my mental energy to try to be rational about emotional things. I have been working very hard on not letting my emotions overwhelm me and cause me undue stress. I know that I am in control of how I respond to situations in my life, but when you are dealing with matters of the heart, it can be hard to remember that. I am in control of how I deal with MY emotions and I never want to put that stress or responsibility on someone else. Even when the emotions I am feeling are good and happy and positive, it is still sometimes overwhelming because it is so new and different for me to be feeling this way about someone.
5. Related to #4, I think I have been trying so (too) hard to be the best person I can be for my love interest that I have paralyzed myself a bit. I know that I can be myself, that I can say whatever I need to say, and he will not go away. He has shown me over and over that he is not going to run away if I'm a little bit crazy. :) However, I am still putting pressure on myself to keep my emotions in check and learn how to deal with some things myself, like I said above. I love being challenged to be the best person I can be...I LOVE IT. But it can make me want to throw myself on the floor and cry sometimes, too. Which is ok!
I think in this case, having a good cry would just relieve the tension a bit. It's an emotional release, like a mikvah. It can allow you to have a feeling of starting anew and with a fresh mindset.