Sudden Cramps and nausea first trimester pregnancy.

I'm around 5/6 weeks pregnant, so far I have had very faint symptoms, a little cramping here and there and a little sore boobs or nausea occasionally but today I've got very strong cramps and very intense sickness to the point that I feel unwell, last night I was also very off of my food I couldn't eat. Could this be a result in a increased in hcg levels so now my symptoms are stronger or just a spout of stronger symptoms? Did this happen to anyone else? I have heard symptoms fluctuate but couldn't find much on very sudden nausea and cramping! If anyone else has had this too please share your experience!