I Think I Am Pregnant But To Early To Test.

I think I am pregnant but to early to test. We had sex the day I was ovulating and ever since have had major symptoms including swollen chest, raging headaches, nausea and throwing up, terrible exhaustion and mood swings. Tonight my clit became swollen. Is this a yeast infection or a symptom of pregnancy. I've had it with all three of my kids who are all a year apart but only once was it a result of a yeast infection. So not sure at this point.