Confuse and really need suggestions asap!

So this goes like this... We tried to conceive this month of october begining and was due for af on the 20-21st this month but I got a nice heavy bleed(mostly brown and gooey) on the 19th till 23rd(strange cuz I usually get af for full 5 days straight) so today on cd-7 I am having pink spotting on tp which is very very strange for me. I have been dizzy with banging headache and fever from cd-5 and today no fever just headache and dizzy. I have been crazily emotional and crying off-cycle( which usually happens before periods) I dont want to test but I have heard of bfps after period. I dont have a pregnancy test right now with me. But I wondering if I should get one and spend my money on it.

Please suggest what should I do.