worried and confused... help!?

so i've been with my boyfriend for a week now, having unprotected sex (but on BC pill) while i was ovulating. after we had sex the first few times, i bled for a few days. i took it as my body not being use to us being so rough (sorry tmi) and it stopped after a few days. since then, i've had severe nausea, some vomiting, a really bad constant headache, extreme fatigue but insomnia, much more frequent urination, a random craving for mashed otato but unable to stomach other foods, and /extreme/ moodswings (which i have normally due to BPD and bipolar, but these are worse than normal). my period isnt due for another couple of weeks, so i know its too early to test but does anyone think this could be pregnancy symptoms? i've been pregnant before (two miscarriages) but nothing this sudden apart from fatigue. i've seen the doctor and he doesnt seem to think its anything serious. any advice or anyone had this before??