When I tried updating the images by using the same photo I uploaded, I noticed some of them have changed URLs. From 2.bp, I see some with 1.bp or 4.bp. I have no idea what happened since my photos were never moved. :/
I read around and was relieved to know this isn't an isolated case. It seems like blogger's image host 2.bp.blogspot.com is really down.
It's quite a bummer really.
ETA: False alarm goys, apparently, http://2.bp.blogspot.com was blocked by the company (for some reason). So much for my silly rants. Props to the Blogger Forum for helping me discover the real issue and to those who responded to my twitter rage charot haha.
I posted this topic on the forum and an expert answered me about how blogger images have multiple mirrors you can access just by changing the first digit.
Look, all of these URLs point to the same image
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-hzibNSHzceDoVzQFdNhmfwlPSzWwrC5K6aJpxRDWi_OrP2YHNwk-MKGT07NJ03xxmyOXKWTAJG2vGtpSVsna2Bj1tCa25iQSPxs3GPrcjhGBeRoB575s6FSRWqcWu_p-w5E441deV_Y/s1600/DSC_1111.JPG
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-hzibNSHzceDoVzQFdNhmfwlPSzWwrC5K6aJpxRDWi_OrP2YHNwk-MKGT07NJ03xxmyOXKWTAJG2vGtpSVsna2Bj1tCa25iQSPxs3GPrcjhGBeRoB575s6FSRWqcWu_p-w5E441deV_Y/s1600/DSC_1111.JPG
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-hzibNSHzceDoVzQFdNhmfwlPSzWwrC5K6aJpxRDWi_OrP2YHNwk-MKGT07NJ03xxmyOXKWTAJG2vGtpSVsna2Bj1tCa25iQSPxs3GPrcjhGBeRoB575s6FSRWqcWu_p-w5E441deV_Y/s1600/DSC_1111.JPG
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-hzibNSHzceDoVzQFdNhmfwlPSzWwrC5K6aJpxRDWi_OrP2YHNwk-MKGT07NJ03xxmyOXKWTAJG2vGtpSVsna2Bj1tCa25iQSPxs3GPrcjhGBeRoB575s6FSRWqcWu_p-w5E441deV_Y/s1600/DSC_1111.JPG
Amaaaaazing thing I learned today! :D