I've had unprotected sex 3 times but the last time I had unprotected sex I started my period the next day and the 1st time I took the plan b. he pulled out al times tho and didn't ejaculate. I just started eating meat again as well after being a vegetarian for 3 years. I haven't been sick but my nipples constantly hurt and today I noted they were puffy and sore to the touch. (I also had been very cold for about 45 minutes straight before I noticed this) why is this happening? am.I pregnant?