Feeling poorly at 5 week 6 days

I feel so poorly, zero energy, nausea and generally feeling crap. Mild cramping and achy belly but zero pregnancy symptoms should I be worried? My boobs don't even hurt. I've had 8 miscarriages and I'm so scared. My levels went from 391 to 6429 in 8 days but I'm worried something is wrong? I've called epu and they said to relax and rest. Does anyone else feel like this?