Burst of energy

Kristen
From the time I got pregnant to about 14 weeks I had no energy what's so ever. It took me forever to wash the clothes and dishes. But now I'm 17 weeks and 1 and I feel like I got a burst of energy. My heart is constantly pounding, I just feel so anxious all the time, kinda like my body is overwhelmed and don't know what to do with itself or how to act. Anyone else experiencing this? Or experienced? I used to work out with my husband but stopped once I got pregnant but since the sickness is pretty much gone im thinking about going back to the gym, and maybe that will help. What do you guys think?