Leg Pain, freaking out!

Christina • We tried to conceive #2 for more than 3 years. Our first child was born in 2006. NTNP
Let me begin by saying I have severe anxiety as well as a couple other mental health issues, so I can and do work myself up over small things.
Ok.
So Friday night, I was up all night because the bottoms of my feet were burning. Weirdest thing ever. Of course I googled is, mostly because I was curious if it could be an early pregnancy symptom as I am TTC. When I google a symptom my mind normally focuses on the word possible cause, in this case it was a blood clot.
My rational brain told me that a blood clot was unlikely because both feet were burning, not just one. A short time later, my left calf muscle began to twitch/spasm. It was not painful but lasted a good long while. I think that I got panicky and began tightening the muscle. Eventually I fell asleep.
Saturday I woke up and my feet weren't burning but my legs felt odd, tight. We had plans for the day so I shrugged it off and we left the house. Once we were out and walking, I began to get this pulling or cramping sensation in my left calf, it's not super painful and only lasts a second but happens every few steps. Of course I started freaking out, popped some panick pills and pushed through it, wobbling away.
Sunday I was sure it would be better. But nope, after about an hour of being up and about it started up again. I just don't know what to think. I'm terrified of getting a blood clot, it's one of my biggest fears, and I often jump to that conclusion. Is it possible I'm doing it again. Aren't they super painful and hurt constantly? I have no swelling, no difference in size or color in legs, I've probed around and can't find any area tender to touch or hot. WTF is going on?