I'm 2 Days Late. Constipated. I've Taken 2 Plan B

I'm 2 days late. Constipated. I've taken 2 plan b pills about 36-48 hours apart. I'm tired but I don't sleep. I'm hungry but I get full too fast. My mood swings are HIGHLY abnormal for my usual menstrual cycle. I'm not sure if he ejaculated in me or not, although I'm pretty positive he did. Is this the plan b making me feel this way? Or do I need a home test?