On the pill but feel very pregnant!

So I have been on the pill for years. Off for one month and got pregnant with my handsome lil boy. After he was born I started back on birth control. He is now 4 and I have been very consistent taking my pills. This month hubby and I have had LOTS of sex! It's about time for my period and I have horrible pregnancy symptoms!!! Severe sore breasts, cramping, bloating and nausea. What's your thoughts? Could I be pregnant? I would be excited!! But was hoping to wait to try for #2 until hubby is done with med school!