Period was due march 29th but instead got light bleeding for 3days, now feeling bloated and bit nauseous after eating, pregnant?

Menstrual bleeding : About 30% of women can experience light spotting or bleeding during the first trimester. Implantation bleeding is typically dark blown or light pink and some women mistake it for a light period. If you had unprotected sex during your cycle, pregnancy is always possible, so I would recommend taking a pregnancy test. However, you should be using condoms to prevent pregnancy and STDs.