was on the pill but I have been missing it...

Well, you can't have your period while your pregnant, not exactly anyway, you have spotting while your pregnant. Do NOT stress because then your body will be tricked into thinking you are and there won't be any actual baby. The symptoms of pregnancy are basically the same as pms for the most part, I don't know all the exact ones since sites vary on what the signs and symptoms are, but what the overall census about them are increased urination, increased hunger, food aversions, nausea/vomiting, cravings, fatigue, breast tenderness, lower-back pain, missed period, implantation bleeding or spotting(slight staining of pink or brown color), & implantation cramps.