I am currently 4 weeks and 6 days pregnant and about two days ago I noticed some pinkish spotting then, the nest day it became a bright red color and the bleeding got heavier. Is this bleeding decidual bleeding or something different? Please help!

At this point in your prengnancy, any bleeding is a concern. It could be nothing, it could be something. You need to schedule an appt with your dr right away. They are going to need to verify viability of your pregnancy with either an ultra sound (to find the heartbeat) or with an HCG count to make sure your levels are OK. Some women bleed during the first couple of months of pregnancy, some through their entire pregnancy but that doesn't happen normally. You really need to seek medical attention!

Good luck!