Melatonin

I’ve been on melatonin for 2/3 months. The melatonin had no side effects that I knew of. I started this past month feeling low energy and fatigue. I looked up melatonin and saw that a side effect is exactly how I’m feeling. I also read it leaves your system quickly. I haven’t taken a dose in the past48 hours. Wasn’t sure if I should feel the effects of it still, I’ll probably request blood work too just in case something else is going on. I’ve never felt so exhausted in my life and I get enough sleep, no I’m not

Pregnant.