Please help

So I’ve missed my period for 3-4 day now and took a dollar tree test which it was negative idk if those actually work so.... but I’ve been feeling a lil bad every once in awhile but..... every time me and my bf have sex it really painful and he has to go really slow and then after it feels ok but it’s not the best and I have a swollen lymph node where my thighs meet and is really painful 😂 ik I’m all over the place but any help?🤷🏼‍♀️