So, I'm 21, I've been sexually active (same partner, clean) for the past year. Lately we've been 'on and off', and during sex, we don't use a condom until later on. It's irresponsible, yes..

For the past 2-3 months, my regular, heavy, flows have been scanty. Since puberty, I've had my period regularly, and it is always heavy for at least 3 days, sometimes up to 5. They have changed so drastically that I think I may be pregnant. There is very little bleeding, less than... I'd say a tablespoon of blood (gross measurement idea, I know) in the week my period would usually occur.

What are the chances that this is more than just a stressed out few months? Could I be pregnant? Other symptoms are tiredness, general aching, some nausea (no set time of the day, not even a daily occurrence).

Any ideas?