Stopped labor at 30weeks 2days

So yesterday I all of a sudden went really faint and sick and had diarrhoea. Then it went away. Then at tea time I had what I thought were Braxton hicks for about an hour and then that went away. I couldn't sleep all night because of restless legs so I walked around a lot. And today went to see my doctor who told me my cervix had thinned considerably and he thinks I may have been having real contractions last night but labor seems to have stopped. I'm so confused he didn't explain very well and I didn't believe him that much. He checked baby's heart beat and it was 154 witch is normal for us and he said I had to be on bed rest for a week as it's clear to him I'm doing too much. I don't get how as I never leave the house and hardly do anything anyway. But he also said he's not concerned and I shouldn't worry. My question is has anyone else had this and what are the chances my baby might come early? Because I'm not worried and worrying that getting worked up about it will make it worse