frequency

So, a topic that has been weighing on my mind over the course of this winter: the frequency with which I have sex. Whether or not I want to admit it, this has been a big concern for almost the entire time I have been with my fiance. For much of our relationship, it has held steady at about once a week. I keep track. I know that's maladaptive. Anyhow, when I started seeing my sexologist, frequency increased to twice a week. I was pretty happy about that. Then, my session ended at the beginning of December. Frequency has seen dropped to twice a month. I have experienced a wide variety of emotions about this. I was bothered- are we so settled and boring that this is how its gonna be from now on? Is sex not an important part of our relationship? Is he noticing the weight I've put on this winter?
Recently I realized that the decrease in frequency wasn't a problem, as far as my desires. I didn't actually need sex more frequently that twice a month. That freaked me out even more. I didn't want to masturbate much either. What the hell was going on?
We went camping with a friend over spring break and when we returned: sex that night, and the morning after. Thus, my newest hypothesis: maybe this is just a winter thing, and with the snow finally melted, perhaps I will be marking my maladaptive sex calendar on a more regular basis.