Any advice ?

I'm having severe headaches , it's so hard to keep a appetite an I've tried everything she's told me to do with nothing changing. The baby's movements have decreased dramatically the past 2 days . I get so light headed an it just feels like my body is shutting down . Not sure if it's just the pregnancy or what an if their just isn't any room for her to move as much anymore. I notice movements maybe 3 times a day but she used to be active all the time. My back an lower abdomen get so sore that I’m almost doubled over after walking through Walmart . I get this shooting pain in my right leg an I don’t know what’s causing it. Sometimes I can barely put any pressure on my right leg bc the pain goes from my leg/foot straight to my lower right abdomen where my leg an belly meet if that makes sense. Has been happening on an off for past few days. I just feel like I don’t know what to do . Also I’ll be 38 weeks tomorrow.