Scared

So almost 3 weeks ago me and my bf had like an experiment I guess I would call it. where we had 'sex' for like 30 seconds without a condom just to try it out (stupid I know, especially cause I'm not on birth control either). Anyways he said he didn't cum and probably no pre-cum either cause we weren't really doing anything before. though since then I don't know if it's just my brain or what but I've had some weirder or different things happen to me since then. like

• my favorite tomato-y foods almost giving me a lil bit of a gag reflex when I first smelled them

• Everything being a lil more sensitive down there than I remember and sometimes almost a lil painful

According to eve my period is due in 6 days, and me and my bf never actually 'popped' my cherry either not that, that means much

Do you think I should be concerned?