Question Please Comment

Ok so I’m not TTC, but not using protection. Me and my husband do smoke marijuana, and the past few times weve smoked I’ve had a different reaction after.. i know its not the marijuana because there are several others smoking the same batch and they are having normal effects. The only time this has ever happened to me was my first pregnancy. Could this be a symptom? Should I test just to be safe? I know this may be a dumb question lol but I really have no idea and did think it was strange since I’m not new to thc