8 weeks pregnant and cramps

I'm currently 8 weeks 1 day pregnant with # 2 and have had constant cramping for a week now. I take Tylenol for it and ut dulls the pain for about a hour but can still feel the cramps, and gets stronger again once the Tylenol wears off. And not to mention I feel completely drained and have zero energy for anything. Im always tired and nap at least 2 times a day spmedays maybe more. Ive been drinking plenty of fluids and have to take meds for nausea since I have mirning sickness all day and night and my next apt is tomorrow afternoon. Also I dont have a appetite for anything now I have to just eat something and hope it stay down. I use to be able to eat my favorite foods but since 7 weeks 4 days I cant even do that. Any advice?