Ladies help I'm so confused

We've been ttc for a long time well my periods have been super weird well I didn't have a period for October but I had lots of clear discharge with streaks of blood in it 12-15 of November and now today I'm spotting again but a tad bit heavier. We had sex the 19th. I do have slight cramps like I did 12-15. But I'm curious to know what y'all think it could be? P.s I haven't been on birth control in about 2 years. This has never happened to me before. What could it be? Has this happened to anuone??