Having an odd period!!!

Liz
I normally have light periods since stopping birth control but with at least medium flow the first day. I also spot the day before I come on. This month I spotted on and off since wed and then heavier spotting yesterday-mainly brown with a tiny bit of red. Well today I barely need a tampon. My periods are normally light but this is ridiculous. Any chance I could be pregnant. Trying not to get my hopes up but this is not normal for me. Thoughts? X