Missed periods. Them about 2-3 times.

Hello Doctor, I hope you are doing well. My periods are generally unpredictable; they can happen at any time of the month. I have not gotten my period for February, but I am observing thick, jelly-like brown discharge (though just a few minutes ago, I noticed discharge with no color). A few days ago, I had a severe headache and eye pain on the right side. I also felt very dizzy and had to vomit once. After that day, I haven't felt like eating as much as I used to. I was also eating a lot of junk food before this happened. I also feel dizziness after I wake up, which is usual for me, but all of this has made me doubt that too. I had my last intercourse on January 30th, 31st, and February 1st, 2nd, 3rd, and 4th, during which we used condoms, but did not use them about 2-3 times.