Clomid or pregnancy symptoms?

So I took 50mg clomid cd5-9 and am also on 1000th of Metformin. I am now on cd19. I have not had a positive opk yet. Yesterday I started feeling really off I already have 1 child and it's bringing me back to that time, the food aversions was the first clue to her but I didn't find out about her until I was a month prego. I am exhausted and so nauseated. But without a positive opk I feel doubtful, we have been bd tho every other day. What do you ladies think?