spotting like pinkish blood and am still getting symptoms

Hi,
Am really concerned about my health i had unprotected sex with my Bf. My last period finished on the 23rd of February, i was surppose to come on my periods again on the 15th of March and i got all the typical normal pregnancy symtoms like bloated stomach, constant trips to the toilet, always hungry even when i have eaten a full diner, sore breasts. SO naturally thought i was pregnant but on the 28th of March i came on my periods but it wasn't like my normal periods it was not that heavy and only lasted for 5 days. But 6 days after i started spotting like pinkish blood and am still getting your normal prenancy symtoms:( please some one help me AM I PREGNANT??
thanks xxx