ECP delayed period- pregnancy symptoms?

Hi...one month ago, on Day 6 of my cycle (28 days) my boyfriend and I dry-humped for the first time. I was still spotting from my period so I was wearing my napkin, panties and nylon spankies..my boyfriend was wearing his jeans, but later on pulled them off..so he was just in his boxers...later on I noticed that his penis slipped out of his boxers ad was rubbing onto my spankies..he did not cum...but he said earlier that he was wet...and I was worried that pre cum might have soaked thru my underwear(although I ddnt feel it coz of the napkin) so after 72 hours, I took ECP...4 pills of nordette and 4 more pills after 12 hours...Went to the OB for a routine US (day 9 of my cycle) and it said that I had few small follicles in both my ovaries and a very thick endometrium of 15mm..so does that mean that I havent ovulated yet? anyway, I experieced palpitations, nausea, back pain and headache in the followng days and I got my period 7 days after the first ECP dose...my period lasted for about 4 heavy days and the spotting lasted for about 2 weeks...there were times when I had snot like blood in clear discharge and stringy dark brown blood....was this normal? Also, about a week after my ECP period (I think on day 14) I started feeling nauseous, getting headaches, lower back aches, palpitations, sore/enlarged breasts...etc. this lasted for about a week and then gradually disappeared...I think these are PMS symptoms or early pregnancy symptoms (God forbid!) but then why did I get them 2 weeks before the time I'm supposed to be due? and why did they disappeare right around the time im supposed to get my period? also, right now, I'm 2 days delayed for my period(counting from the ECP period I got)...All I have is clear-whitish discharge...I feel wet like im getting my period but when I look, its just clear-whtish discharge Do you think this is normal? Could I be pregnant? Since I got the ECP period, I've only had 2 sexual encounters which involved dry humping fully clothed in jeans and the other time, my boyfriend fingered me but outside of my cotton underwear (i never let him have direct contact with my genitals)..i am 100% sure there was no leaking pre-cum or cum in both incidents! do you think I could be pregnant? please help im so worried